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Cheap flights from Seattle (SEA) to London (LON) from $394

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 8/10. 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 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
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 16, 2024.

Popular in

June

Cheapest in

November

Round-trip from

$643

One-way from

$411
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 Air Canada flights from Seattle to London

Explore cheap flight options specifically provided by Air Canada 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 2,637,452 searches. Data last updated May 16, 2024.
Peruse some of the lowest-priced Air Canada flights we've found from Seattle to London. Deals update often to give you more flight options matching your criteria
Wed 8/711:40 amSEA - LHR
1 stop12h 55mAir Canada
Thu 9/192:10 pmLHR - SEA
1 stop12h 16mAir Canada
Deal found 5/15$720
Sun 8/1110:40 amSEA - LHR
2 stops17h 10mAir Canada
Sat 8/319:30 amLHR - SEA
1 stop19h 55mAir Canada
Deal found 5/15$748
Mon 5/203:10 pmSEA - LHR
1 stop14h 10mAir Canada
Wed 6/52:05 pmLHR - SEA
1 stop15h 11mAir Canada
Deal found 5/15$792
Mon 5/207:40 amSEA - LHR
1 stop14h 50mAir Canada
Sun 5/269:30 amLHR - SEA
2 stops16h 57mAir Canada
Deal found 5/16$920
Tue 5/217:40 amSEA - LHR
2 stops17h 55mAir Canada
Sun 5/269:30 amLHR - SEA
2 stops16h 57mAir Canada
Deal found 5/16$926

  • Air Canada is one of the most popular airlines used for those traveling from Seattle to London. Flights on this route from Air Canada typically cost $982.93 RT, a price that is 73% cheaper than the average Seattle to London flight. The cheapest flight found was $637 RT. The most popular departure airport in Seattle when flying to London is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, Air Canada flights are 5% more popular than any other airline flying that same route.

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 2,637,452 searches. Data last updated May 16, 2024.
Some of the lowest-priced Delta 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.
Sun 8/119:15 pmSEA - LHR
Nonstop9h 35mDelta
Sun 9/2212:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 5/15$742
Tue 8/67:20 amSEA - LHR
1 stop15h 25mDelta
Sat 8/314:50 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 5/16$747
Wed 6/129:10 pmSEA - LHR
Nonstop9h 40mDelta
Wed 6/1911:30 amLHR - SEA
1 stop14h 05mDelta
Deal found 5/14$763
Sun 6/29:10 pmSEA - LHR
Nonstop9h 40mDelta
Tue 6/116:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 5/15$764
Tue 8/139:15 pmSEA - LHR
Nonstop9h 35mDelta
Mon 9/2312:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 5/15$767
Sun 5/196:10 amSEA - LHR
1 stop16h 35mDelta
Tue 6/46:15 amLHR - SEA
1 stop19h 20mDelta
Deal found 5/15$768
Mon 5/2012:40 amSEA - LHR
1 stop22h 35mDelta
Tue 5/284:50 pmLHR - SEA
Nonstop10h 30mDelta
Deal found 5/14$775
Sat 8/109:15 pmSEA - LHR
Nonstop9h 35mDelta
Sun 9/2212:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 5/15$792
Thu 6/69:10 pmSEA - LHR
Nonstop9h 40mDelta
Tue 6/119:00 amLHR - SEA
1 stop16h 35mDelta
Deal found 5/14$813

  • One of the most popular airlines traveling from Seattle to London is Delta. Flights from Delta traveling this route typically cost $1,262.70 RT. This price is typically 59% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was $1,016. 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 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 2,637,452 searches. Prices were last updated on May 16, 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 6/1810:40 amSEA - LHR
2 stops15h 20mMultiple Airlines
Tue 9/1010:50 amLHR - SEA
2 stops19h 30mMultiple Airlines
Deal found 5/15$679
Mon 6/241:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 8/309:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/15$680
Mon 6/175:10 amSEA - LGW
2 stops21h 00mAmerican Airlines
Tue 9/1010:40 amLGW - SEA
2 stops20h 10mAmerican Airlines
Deal found 5/15$682
Mon 6/245:53 amSEA - LHR
1 stop17h 47mAmerican Airlines
Fri 8/309:50 amLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/15$683
Mon 6/1710:40 amSEA - LHR
2 stops17h 10mMultiple Airlines
Wed 9/1110:50 amLHR - SEA
2 stops19h 30mMultiple Airlines
Deal found 5/15$685
Mon 6/179:10 pmSEA - LHR
Nonstop9h 40mDelta
Tue 9/1011:30 amLHR - SEA
1 stop14h 20mDelta
Deal found 5/15$686
Sat 6/811:10 pmSEA - LGW
2 stops25h 50mMultiple Airlines
Tue 6/1110:00 amLGW - SEA
2 stops30h 32mMultiple Airlines
Deal found 5/15$689
Sun 6/1612:40 amSEA - LHR
1 stop22h 35mDelta
Tue 9/106:15 amLHR - SEA
1 stop19h 35mDelta
Deal found 5/16$690
Mon 6/243:10 pmSEA - LHR
2 stops31h 20mLufthansa
Fri 8/309:30 amLHR - SEA
2 stops35h 00mLufthansa
Deal found 5/15$692

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 2,637,452 searches. Data last updated May 16, 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 stop28h 45mMultiple Airlines
Deal found 5/15$528
Tue 10/15:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Tue 10/812:00 pmLGW - SEA
1 stop16h 21mMultiple Airlines
Deal found 5/15$536
Mon 9/306:55 pmSEA - LGW
1 stop32h 50mIcelandair
Mon 10/71:00 pmLGW - SEA
1 stop36h 55mIcelandair
Deal found 5/15$556
Fri 9/65:00 pmSEA - LGW
1 stop33h 55mMultiple Airlines
Tue 9/1712:00 pmLGW - SEA
1 stop28h 45mMultiple Airlines
Deal found 5/15$563
Mon 9/303:50 pmSEA - LGW
1 stop11h 55mMultiple Airlines
Tue 10/812:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 5/15$568
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
Sun 10/63:50 pmSEA - LGW
1 stop11h 55mMultiple Airlines
Tue 10/812:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 5/15$576
Tue 10/83:10 pmSEA - LHR
1 stop14h 10mLufthansa
Tue 10/152:10 pmLHR - SEA
1 stop30h 20mLufthansa
Deal found 5/15$582
Sun 11/242:35 pmSEA - LHR
1 stop12h 20mIcelandair
Wed 12/48:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/15$584

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 2,637,452 searches. Data last updated May 16, 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 8/139:15 pmSEA - LHR
Nonstop9h 35mKLM
Wed 8/284:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/15$717
Tue 8/69:15 pmSEA - LHR
Nonstop9h 35mKLM
Sat 8/314:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/15$742
Tue 8/69:15 pmSEA - LHR
Nonstop9h 35mKLM
Sat 8/314:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/16$743
Sun 8/117:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 8/289:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/15$745
Sun 8/117:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 9/209:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/15$759
Tue 8/139:15 pmSEA - LHR
Nonstop9h 35mDelta
Mon 9/2312:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 5/15$767
Sun 6/29:10 pmSEA - LHR
Nonstop9h 40mKLM
Wed 6/194:50 pmLHR - SEA
Nonstop10h 20mKLM
Deal found 5/15$770
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Wed 5/2912:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 5/16$771
Sun 5/194:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 6/44:50 pmLHR - SEA
Nonstop10h 20mVirgin Atlantic
Deal found 5/15$772

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 2,637,452 searches. Data last updated May 16, 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.
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 5/289:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 5/14$763
Tue 5/214:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 6/411:30 amLHR - SEA
1 stop14h 05mDelta
Deal found 5/15$764
Sun 5/196:10 amSEA - LHR
1 stop16h 35mDelta
Tue 6/46:15 amLHR - SEA
1 stop19h 20mDelta
Deal found 5/15$768
Sun 5/191:10 pmSEA - LHR
1 stop17h 00mUnited Airlines
Tue 6/46:50 amLHR - SEA
2 stops21h 20mUnited Airlines
Deal found 5/15$769
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
Sun 5/194:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 6/44:50 pmLHR - SEA
Nonstop10h 20mVirgin Atlantic
Deal found 5/15$772
Mon 5/2012:40 amSEA - LHR
1 stop22h 35mDelta
Tue 5/284:50 pmLHR - SEA
Nonstop10h 30mDelta
Deal found 5/14$775
Mon 5/2010:56 pmSEA - LHR
1 stop13h 14mVirgin Atlantic
Mon 5/275:35 pmLHR - SEA
1 stop25h 45mVirgin Atlantic
Deal found 5/15$780

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 2,637,452 searches. Data last updated May 16, 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.
Sat 8/1011:00 pmSEA - LHR
1 stop13h 20mIcelandair
Deal found 5/15$394
Thu 7/1811:00 pmSEA - LGW
1 stop28h 45mIcelandair
Deal found 5/15$395
Sun 8/411:00 pmSEA - LTN
3 stops38h 00mMultiple Airlines
Deal found 5/14$396
Mon 7/223:50 pmSEA - LGW
3 stops20h 20mMultiple Airlines
Deal found 5/15$397
Wed 7/175:15 pmSEA - LGW
1 stop33h 40mMultiple Airlines
Deal found 5/15$398
Thu 7/41:50 pmSEA - LTN
2 stops24h 20mMultiple Airlines
Deal found 5/16$398
Tue 7/166:55 pmSEA - LCY
2 stops18h 40mMultiple Airlines
Deal found 5/15$399
Fri 8/91:50 pmSEA - LGW
3 stops28h 25mMultiple Airlines
Deal found 5/16$399
Thu 7/41:50 pmSEA - LGW
2 stops21h 05mMultiple Airlines
Deal found 5/15$400

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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$648 - $742

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon City

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/8

2 stops20h 15m

London City

Tue 10/22

2 stops17h 01m

$648

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 City

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/1

1 stop18h 10m

London City

Tue 10/8

2 stops17h 09m

$699

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 8/11

1 stop28h 45m

London Gatwick

Mon 8/26

1 stop30h 20m

$719

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 8/7

1 stop12h 55m

London Heathrow

Thu 9/19

1 stop12h 16m

$720

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 7/10

1 stop14h 45m

London Gatwick

Sun 10/6

1 stop18h 20m

$721

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 8/8

2 stops16h 40m

London Heathrow

Wed 9/18

2 stops17h 46m

$726

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 8/8

1 stop12h 10m

London Heathrow

Thu 8/22

1 stop17h 21m

$731

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 8/11

Nonstop9h 35m

London Heathrow

Sun 9/22

Nonstop9h 55m

$742

Flights are sorted by cheapest first

Deals found on 5/15

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 $397 while a round-trip flight costs $709. 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 16, 2024.
See what other customers who have flown with Air Canada, Delta and British Airways 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
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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
1,994 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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
1,376 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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
735 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Crew

8.6

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 $700 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under $700. The cheapest flight booked recently is on SWISS for just $648, but on average you can expect to pay $700.

  • Are there nonstop flights from Seattle to London for under $800 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London under $800. A good price for a nonstop flight from Seattle to London is less than $785.

  • 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 $648. Other airlines that can offer you cheap pricing are KLM, from $672, and Lufthansa, from $699. Users have found that SWISS is 24% 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 16, 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 2,637,452 searches. Data last updated May 16, 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

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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 16, 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 16, 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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