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Cheap flights from Seattle (SEA) to London (LON) from $250

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — LON
May 20 — May 271
From?
To?
Mon 5/20
Mon 5/27
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to London are usually found in November or January, booked 7 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to London

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 15, 2024.

Popular in

June

Cheapest in

November

Round-trip from

$643

One-way from

$250
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 19% potential price drop
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From Seattle/Tacoma Intl to London (LON)
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One-way flight from Seattle/Tacoma Intl to London (LON)
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What is the cheapest day to fly round-trip from Seattle to London?

Friday flights are found to be more expensive to fly from Seattle to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from Seattle to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 8 days in advance, which can save you up to 55% on flights from Seattle to London compared to booking the week you need them. Waiting 8 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $646. For sooner than that we have options available in the next 3 days from $1,159.

What is the cheapest month to fly from Seattle to London?

November is one of the best times of the year to fly to London from Seattle. Prices for November average $860 per person but you can even find prices for as low as $560. The most expensive prices can be found in the month of June. Opting for a November flight can save you 39% on your journey compared to booking in June

When is the cheapest time to fly from Seattle to London (SEA - LON)?

One of the essential ways to save on airfare from Seattle to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 16% on airfare.

Cheap Delta flights from Seattle to London

Explore cheap flight options specifically provided by Delta for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Peruse some of the lowest-priced Delta flights we've found from Seattle to London. Deals update often to give you more flight options matching your criteria
Tue 8/2011:15 amSEA - LGW
1 stop14h 45mDelta
Tue 8/2712:00 pmLGW - SEA
1 stop18h 23mDelta
Deal found 5/14$671
Sun 6/2312:25 amSEA - LHR
1 stop22h 50mDelta
Fri 8/301:20 pmLHR - SEA
1 stop16h 54mDelta
Deal found 5/14$707
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 5/289:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 5/14$763
Sun 6/29:10 pmSEA - LHR
Nonstop9h 40mDelta
Wed 6/196:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 5/15$764
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Mon 5/2711:45 amLHR - SEA
1 stop30h 25mDelta
Deal found 5/13$766
Tue 5/213:45 pmSEA - LHR
1 stop17h 30mDelta
Tue 5/286:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 5/14$768
Mon 5/2012:40 amSEA - LHR
1 stop22h 35mDelta
Tue 5/284:50 pmLHR - SEA
Nonstop10h 30mDelta
Deal found 5/14$775
Mon 5/207:20 amSEA - LHR
1 stop18h 40mDelta
Mon 5/275:35 pmLHR - SEA
1 stop25h 45mDelta
Deal found 5/14$779
Tue 8/69:15 pmSEA - LHR
Nonstop9h 35mDelta
Tue 8/2011:45 amLHR - SEA
1 stop18h 30mDelta
Deal found 5/14$780

  • One of the most popular airlines traveling from Seattle to London is Delta. Flights from Delta traveling this route typically cost $982.93 RT. This price is typically 68% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was $637. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to London. London Heathrow Airport is the most popular arrival airport in London. When flying from Seattle to London, Delta flights are 5% more popular than any other airline flying that same route.

Cheap Iberia flights from Seattle to London

Explore cheap flight options specifically provided by Iberia for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Some of the lowest-priced Iberia flights we've found at this time heading from Seattle to London. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 8/610:08 amSEA - LHR
1 stop13h 52mIberia
Sun 9/229:45 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/15$750
Sat 8/1010:08 amSEA - LHR
1 stop13h 52mIberia
Fri 9/209:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/15$752
Fri 7/261:30 pmSEA - LHR
Nonstop9h 20mIberia
Sun 8/259:45 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/14$857
Fri 8/21:30 pmSEA - LHR
Nonstop9h 20mIberia
Mon 8/192:25 pmLHR - SEA
1 stop15h 31mIberia
Deal found 5/14$880
Sun 8/117:40 pmSEA - LHR
Nonstop9h 20mIberia
Mon 8/269:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/14$887

  • One of the most popular airlines traveling from Seattle to London is Iberia. Flights on this route from Iberia typically cost $1,262.70 RT, a price that is 59% cheaper than the average Seattle to London flight. The cheapest flight found was $1,016 RT. When traveling from Seattle to London on Iberia, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is London Heathrow Airport. When flying from Seattle to London, Iberia flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to London flights in May & June 2024

Find cheap flight options from Seattle to London specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Prices were last updated on May 15, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Mon 6/246:05 amSEA - LHR
1 stop17h 10mVirgin Atlantic
Fri 8/304:50 pmLHR - SEA
Nonstop10h 25mVirgin Atlantic
Deal found 5/14$669
Mon 6/179:10 pmSEA - LHR
Nonstop9h 40mAir France
Tue 9/1011:30 amLHR - SEA
1 stop14h 20mAir France
Deal found 5/14$685
Sun 6/1612:40 amSEA - LHR
1 stop22h 35mDelta
Wed 9/116:15 amLHR - SEA
1 stop19h 35mDelta
Deal found 5/14$690
Mon 6/179:10 pmSEA - LHR
Nonstop9h 40mKLM
Wed 9/114:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 5/14$692
Sun 6/1612:40 amSEA - LHR
1 stop22h 35mDelta
Wed 9/114:50 pmLHR - SEA
Nonstop10h 30mDelta
Deal found 5/14$697
Sun 6/2312:25 amSEA - LHR
1 stop22h 50mDelta
Fri 8/301:20 pmLHR - SEA
1 stop16h 54mDelta
Deal found 5/14$707
Mon 6/106:55 pmSEA - LGW
2 stops17h 00mMultiple Airlines
Sun 6/166:10 pmLGW - SEA
2 stops34h 25mMultiple Airlines
Deal found 5/14$738
Mon 6/176:02 pmSEA - LGW
2 stops28h 18mMultiple Airlines
Fri 6/218:40 pmLGW - SEA
2 stops27h 26mMultiple Airlines
Deal found 5/14$740
Sun 6/1611:00 pmSEA - LGW
2 stops31h 50mMultiple Airlines
Mon 6/248:45 pmLGW - SEA
2 stops22h 35mMultiple Airlines
Deal found 5/15$743

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Tue 10/15:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Tue 10/812:00 pmLGW - SEA
1 stop16h 21mMultiple Airlines
Deal found 5/14$524
Sat 9/75:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Mon 9/2310:45 amLGW - SEA
1 stop37h 23mMultiple Airlines
Deal found 5/13$548
Mon 9/303:50 pmSEA - LGW
1 stop11h 55mMultiple Airlines
Tue 10/812:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 5/14$574
Tue 10/83:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 11/138:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/14$574
Wed 9/256:55 pmSEA - LHR
1 stop33h 00mIcelandair
Fri 10/111:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 5/14$581
Tue 10/810:40 amSEA - LHR
1 stop18h 40mLufthansa
Wed 11/132:30 pmLHR - SEA
1 stop32h 01mLufthansa
Deal found 5/14$582
Sun 10/66:55 pmSEA - LHR
1 stop17h 25mIcelandair
Mon 10/149:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/14$588
Wed 10/93:50 pmSEA - LHR
1 stop12h 05mIcelandair
Tue 10/159:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/14$590
Sun 9/2211:15 amSEA - LGW
1 stop14h 45mVirgin Atlantic
Wed 10/212:00 pmLGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 5/14$593

Non-stop flights to London from Seattle

Discover non-stop flight options from Seattle to London. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Consider booking one of these non-stop flights heading from Seattle to London. If you're looking for other options for flights from Seattle to London, make sure to update the search form at the top of page.
Tue 10/19:10 pmSEA - LHR
Nonstop9h 40mKLM
Thu 10/104:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/15$614
Thu 9/194:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Thu 10/312:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 5/14$642
Thu 10/37:40 pmSEA - LHR
Nonstop9h 20mIberia
Wed 10/234:00 pmLHR - SEA
Nonstop9h 45mIberia
Deal found 5/13$663
Thu 10/31:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/14$664
Wed 9/187:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/259:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/14$680
Wed 9/187:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/259:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/15$682
Mon 8/267:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 9/179:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/14$691
Sun 9/11:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/39:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/15$692
Tue 8/209:15 pmSEA - LHR
Nonstop9h 35mKLM
Wed 9/44:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 5/15$693

Seattle to London flights leaving soon

Find last-minute flight options from Seattle to London for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Have a look at some of the last-minute flights available departing from Seattle to London. Users should examine the flight details to ensure there are no surprises.
Sun 5/198:20 amSEA - LHR
1 stop20h 00mUnited Airlines
Tue 6/46:55 amLHR - SEA
1 stop18h 04mUnited Airlines
Deal found 5/14$758
Tue 5/217:15 amSEA - LHR
1 stop16h 25mUnited Airlines
Tue 6/410:50 amLHR - SEA
1 stop14h 09mUnited Airlines
Deal found 5/13$761
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 5/289:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 5/14$763
Tue 5/2110:40 amSEA - LHR
2 stops17h 10mLufthansa
Wed 6/56:30 amLHR - SEA
2 stops19h 57mLufthansa
Deal found 5/13$764
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Mon 5/2711:45 amLHR - SEA
1 stop30h 25mDelta
Deal found 5/13$766
Tue 5/213:45 pmSEA - LHR
1 stop17h 30mDelta
Tue 5/286:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 5/14$768
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mKLM
Tue 5/284:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 5/14$770
Tue 5/217:25 amSEA - LHR
2 stops18h 15mUnited Airlines
Tue 5/289:00 amLHR - SEA
2 stops21h 50mUnited Airlines
Deal found 5/14$771
Mon 5/2012:40 amSEA - LHR
1 stop22h 35mDelta
Tue 5/284:50 pmLHR - SEA
Nonstop10h 30mDelta
Deal found 5/14$775

One-way flights to London from Seattle

Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Some of the best available deals we've found on one-way flights from Seattle to London. Those seeking round-trip flights from Seattle to London should utilize the search form at the the top of the page.
Sun 9/296:55 pmSEA - LGW
1 stop32h 50mIcelandair
Deal found 5/14$250
Sun 10/63:50 pmSEA - LGW
1 stop11h 55mIcelandair
Deal found 5/15$251
Sun 9/296:55 pmSEA - LGW
1 stop32h 50mIcelandair
Deal found 5/15$252
Tue 10/15:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 5/13$259
Mon 9/233:50 pmSEA - LGW
1 stop11h 55mIcelandair
Deal found 5/14$269
Tue 9/175:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 5/14$280
Wed 7/105:15 pmSEA - LGW
1 stop33h 40mMultiple Airlines
Deal found 5/14$289
Wed 9/257:00 amSEA - LTN
2 stops28h 00mMultiple Airlines
Deal found 5/14$292
Wed 7/105:15 pmSEA - LGW
1 stop33h 40mMultiple Airlines
Deal found 5/13$293

Find flights from Seattle to London within your budget

Customize your flight search to find flights from Seattle to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$524 - $699

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 10/1

1 stop33h 55m

London Gatwick

Tue 10/8

1 stop28h 45m

$524

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 9/22

1 stop14h 45m

London Gatwick

Wed 10/2

1 stop18h 20m

$593

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 10/15

2 stops24h 11m

London Gatwick

Tue 10/29

2 stops33h 21m

$594

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 10/8

1 stop11h 55m

London Gatwick

Wed 11/13

1 stop13h 00m

$598

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 9/24

2 stops17h 25m

London Gatwick

Wed 10/9

2 stops31h 41m

$618

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 8/20

1 stop14h 45m

London Gatwick

Tue 8/27

1 stop18h 23m

$671

Seattle/Tacoma IntlLondon City

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/1

1 stop12h 00m

London City

Wed 10/9

1 stop15h 30m

$672

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 9/25

1 stop14h 45m

London Gatwick

Sat 10/5

1 stop18h 20m

$689

Seattle/Tacoma IntlLondon City

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/1

1 stop18h 10m

London City

Tue 10/8

2 stops17h 09m

$699

Flights are sorted by cheapest first

Deals found on 5/14

When is the best time to book a flight from Seattle to London?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to London. Price data was last updated on May 10, 2024.
Booking 7 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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When is the cheapest time to fly from Seattle to London?

Use this chart to determine the cheapest time to fly round-trip from Seattle to London. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London flight should consider departing on Wednesday mornings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to London by month

Plan your trip from Seattle to London by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to London is currently $271 while a round-trip flight costs $629. Price data was last updated on May 12, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London (average of $653). Flying from Seattle to London in June is currently the most expensive (average of $1,150). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$673

February

$662

March

$715

April

$692

May

$733

June

$1,150

July

$976

August

$775

September

$745

October

$708

November

$653

December

$672

Temperature and rainfall in London by month

Plan your trip to London by taking into account the average temperature and rainfall totals by month.

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated May 15, 2024.
See what other customers who have flown with Delta, Iberia and Virgin Atlantic from Seattle to London have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,691 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,568 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
1,996 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,378 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.7
Good
736 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Food

7.4

Crew

8.6

Boarding

8.2

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to London?

    If you book a flight to London from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 19 flights from Seattle/Tacoma Intl to London per day from 16 different airlines.

  • Can I find flights from Seattle to London for under $600 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under $600. The cheapest flight booked recently is on Multiple Airlines for just $524, but on average you can expect to pay $592.

  • Are there nonstop flights from Seattle to London for under $700 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London under $700. A good price for a nonstop flight from Seattle to London is less than $700.

  • Are there last-minute flights available from Seattle to London for under $800?

    There are currently 20+ open flights from Seattle to London within the next 7 days for less than $800.

  • What are the cheapest airlines flying from Seattle to London round-trip?

    Cheapflights users have booked flights from Seattle to London round-trip from $593. Other airlines that can offer you cheap pricing are American Airlines, from $594, and Icelandair, from $598. Users have found that Virgin Atlantic is 31% cheaper than the other options available to this destination.

  • What are the most popular routes from Seattle to London?

    When deciding which route to take from Seattle to London consider Seattle/Tacoma Intl - London Heathrow, Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City as they are the most popular.

  • What are the most popular airlines that fly from Seattle to London?

    Before booking your flight from Seattle to London check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

  • What are the most reliable airlines from Seattle to London?

    Consider Air France (74%), Delta (74%) or KLM (74%) when booking your flight. These represent the most reliable airlines when flying from Seattle to London.

  • What are the cheapest flights from Seattle to London?

    Looking at all options, your cheapest flight can be booked for $487. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for $574 on average our data indicates $3,063 when flying from Seattle to London.

  • What does SEA to LHR mean?

    SEA stands for Seattle/Tacoma Intl Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are other airports near this flight route and their unique identifiers/IATA codes.

  • Where are the most common layover locations when flying from Seattle to London?

    The most popular layover on flights from Seattle to London is Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Reykjavik travelers tend to visit Hallgrímskirkja, Icelandic Phallological Museum, and Harpa more than anywhere else. Hallgrímskirkja, Icelandic Phallological Museum, and Harpa are located about 23.2 mi, 23.5 mi, and 23.3 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $55 per day.

  • Where are the least popular layover locations for Seattle to London flights?

    Flights departing from Seattle and landing in London layover in Dublin least frequently.

  • Can I find deals for flights from Seattle to London that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to London that include hotel bookings?

    Yes. In addition to deals on Seattle to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to London.

  • Can I find deals for business class flights from Seattle to London?

    Yes. Cheapflights offers flight deals from Seattle to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to London that allow pets onboard?

    Many airlines flying from Seattle to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to London?

    Yes, you can often find last-minute deals on Seattle to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to London flight deals updated?

    The Seattle to London flight deals you see on this page were last updated on 5/15.

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Fly from Seattle to London on these airlines
Choose from the following airlines for your flight from Seattle to London. Flights are based on user searches made on Cheapflights and were last updated on May 15, 2024.

Virgin Atlantic flights from Seattle/Tacoma Intl to London
British Airways flights from Seattle/Tacoma Intl to London
Icelandair flights from Seattle/Tacoma Intl to London

Top 10 airlines flying from Seattle to London

Discover the top 10 airlines that operate flights from Seattle to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$702FlexibilityNo cancel feeOn-time76%
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IcelandairCheapest$517Average$716FlexibilityNo cancel feeOn-time76%
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Aer LingusCheapest$557Average$808FlexibilityNo cancel feeOn-timeN/A
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FinnairCheapest$572Average$943FlexibilityNo cancel feeOn-time76%
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United AirlinesCheapest$575Average$921FlexibilityNo cancel feeOn-time69%
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IberiaCheapest$582Average$836FlexibilityNo cancel feeOn-time77%
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Air FranceCheapest$588Average$877FlexibilityNo cancel feeOn-time77%
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American AirlinesCheapest$598Average$902FlexibilityNo cancel feeOn-time71%
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Air CanadaCheapest$604Average$902FlexibilityNo cancel feeOn-time67%
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British AirwaysCheapest$625Average$914FlexibilityNo cancel feeOn-time70%
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Search flights from Seattle to London by cabin class

Find flights from Seattle to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Seattle to London

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 15, 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
52%of flight departuresAfternoonNoon to 6 pm
47%of flight departuresEvening6 pm to midnight
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Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 15, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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When you search for this flight from Seattle to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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