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Cheap flights from Portland (PWM) to Heathrow (LHR) from $455

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 9/19. 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.
PWM — LHR
Jun 16 — Jun 231
From?
To?
Sun 6/16
Sun 6/23
1 adult, Economy
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Cheap flight deals from Portland to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Heathrow (LHR). 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 June 11, 2024.

Popular in

June

Cheapest in

December

Round-trip from

$643

One-way from

$455
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 24% potential price drop
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From Portland to London Heathrow
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One-way flight from Portland to London Heathrow
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What is the cheapest day to fly round-trip from Portland, Maine to London Heathrow Airport?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Portland, Maine to London Heathrow Airport?

March can be a great time to fly to London Heathrow Airport from Portland, Maine with a flight ticket averaging about $1,101. Cheapflights users have found deals in the month of March for as cheap as $586. The most expensive prices can be found in the month of June.

What is the cheapest time of day to fly from PWM to LHR?

It’s typically best to fly out from Portland, Maine to London Heathrow Airport at noon. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap Portland to Heathrow flights in June & July 2024

Find cheap flight options from Portland to Heathrow specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,117,830 searches. Prices were last updated on June 11, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. Check back regularly for other flight deals.
Tue 7/92:09 pmPWM - LHR
1 stop12h 06mDelta
Tue 7/1612:10 pmLHR - PWM
1 stop16h 16mDelta
Deal found 6/11$882
Tue 7/95:30 amPWM - LHR
1 stop20h 15mUnited Airlines
Tue 7/1610:50 amLHR - PWM
2 stops18h 03mUnited Airlines
Deal found 6/11$883
Tue 7/92:09 pmPWM - LHR
1 stop11h 36mDelta
Tue 7/169:00 amLHR - PWM
2 stops20h 10mDelta
Deal found 6/11$884
Mon 7/155:03 amPWM - LHR
1 stop10h 07mDelta
Thu 7/259:55 amLHR - PWM
2 stops19h 15mDelta
Deal found 6/11$886
Tue 7/92:09 pmPWM - LHR
1 stop14h 16mDelta
Fri 7/1911:45 amLHR - PWM
2 stops17h 25mDelta
Deal found 6/9$887
Tue 7/92:09 pmPWM - LHR
1 stop12h 56mKLM
Tue 7/1611:35 amLHR - PWM
1 stop15h 25mKLM
Deal found 6/11$891
Tue 7/91:08 pmPWM - LHR
2 stops12h 47mAmerican Airlines
Tue 7/169:35 amLHR - PWM
2 stops18h 05mAmerican Airlines
Deal found 6/11$897
Mon 7/82:09 pmPWM - LHR
2 stops13h 51mDelta
Thu 7/188:20 amLHR - PWM
1 stop11h 51mDelta
Deal found 6/9$921
Thu 7/115:03 amPWM - LHR
1 stop10h 07mDelta
Fri 7/198:20 amLHR - PWM
1 stop11h 51mDelta
Deal found 6/9$951

Portland to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Portland and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,117,830 searches. Data last updated June 11, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. Check back regularly for other flight deals.
Tue 9/241:06 pmPWM - LHR
1 stop15h 24mJetBlue
Tue 10/111:55 amLHR - PWM
1 stop14h 34mJetBlue
Deal found 6/11$567
Tue 10/81:06 pmPWM - LHR
1 stop15h 24mJetBlue
Tue 10/2211:55 amLHR - PWM
1 stop14h 34mJetBlue
Deal found 6/10$612
Tue 9/244:09 pmPWM - LHR
1 stop13h 41mAmerican Airlines
Tue 10/17:40 amLHR - PWM
2 stops18h 36mAmerican Airlines
Deal found 6/10$617
Tue 9/244:09 pmPWM - LHR
2 stops13h 11mAmerican Airlines
Tue 10/17:40 amLHR - PWM
2 stops18h 36mAmerican Airlines
Deal found 6/11$619
Tue 9/244:09 pmPWM - LHR
2 stops13h 11mAmerican Airlines
Tue 10/17:40 amLHR - PWM
2 stops18h 36mAmerican Airlines
Deal found 6/10$620
Wed 9/251:58 pmPWM - LHR
2 stops12h 42mAmerican Airlines
Tue 10/89:50 amLHR - PWM
2 stops17h 24mAmerican Airlines
Deal found 6/10$622
Mon 10/286:00 amPWM - LHR
2 stops21h 10mAir Canada
Thu 11/76:00 pmLHR - PWM
2 stops34h 11mAir Canada
Deal found 6/10$632
Mon 10/283:15 pmPWM - LHR
1 stop11h 40mUnited Airlines
Thu 11/711:10 amLHR - PWM
2 stops17h 38mUnited Airlines
Deal found 6/10$634
Tue 10/86:00 amPWM - LHR
1 stop9h 40mUnited Airlines
Tue 10/226:50 amLHR - PWM
2 stops17h 56mUnited Airlines
Deal found 6/10$640

Portland to Heathrow flights leaving soon

Find last-minute flight options from Portland to Heathrow 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 3,117,830 searches. Data last updated June 11, 2024.
Book one of these great deals on flights from Portland to London. To prevent any unwanted surprises, users should verify their flight info before booking.
Fri 6/214:13 pmPWM - LHR
1 stop10h 32mAmerican Airlines
Fri 6/2812:30 pmLHR - PWM
1 stop15h 05mAmerican Airlines
Deal found 6/10$1,114
Fri 6/214:13 pmPWM - LHR
1 stop13h 17mAmerican Airlines
Fri 6/289:30 amLHR - PWM
2 stops18h 05mAmerican Airlines
Deal found 6/10$1,125
Fri 6/212:08 pmPWM - LHR
2 stops15h 22mDelta
Fri 6/288:40 amLHR - PWM
2 stops20h 44mDelta
Deal found 6/10$1,147
Fri 6/213:50 pmPWM - LHR
2 stops15h 00mMultiple Airlines
Fri 6/286:00 pmLHR - PWM
3 stops24h 51mMultiple Airlines
Deal found 6/10$1,874
Fri 6/2111:50 amPWM - LHR
3 stops17h 10mAir Canada
Fri 6/286:00 pmLHR - PWM
3 stops24h 51mAir Canada
Deal found 6/10$2,054

One-way flights to Heathrow from Portland

Search for one-way flight options from Portland to Heathrow. 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 3,117,830 searches. Data last updated June 11, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to London. Users can also find round-trip Portland to London flights by using the search form above.
Thu 9/1912:58 pmPWM - LHR
2 stops13h 17mDelta
Deal found 6/10$455
Thu 9/1911:28 amPWM - LHR
3 stops17h 32mAir Canada
Deal found 6/10$484
Sat 7/1312:07 pmPWM - LHR
3 stops27h 38mMultiple Airlines
Deal found 6/10$503
Sun 9/152:35 pmPWM - LHR
2 stops12h 45mUnited Airlines
Deal found 6/10$508
Sat 7/134:50 pmPWM - LHR
1 stop32h 05mUnited Airlines
Deal found 6/10$509
Tue 9/1712:28 pmPWM - LHR
3 stops16h 32mAir Canada
Deal found 6/10$514
Sat 7/1311:30 amPWM - LHR
2 stops52h 30mAir Canada
Deal found 6/10$520
Wed 9/189:52 amPWM - LHR
3 stops26h 28mMultiple Airlines
Deal found 6/10$562
Mon 9/169:52 amPWM - LHR
3 stops30h 43mMultiple Airlines
Deal found 6/10$611

Find flights from Portland to Heathrow within your budget

Customize your flight search to find flights from Portland to Heathrow 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 3,117,830 searches. Data last updated June 11, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$567 - $698

Route

Depart

Return

Price

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop15h 24m

London Heathrow

Tue 10/1

1 stop14h 34m

$567

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/8

1 stop15h 24m

London Heathrow

Tue 10/22

1 stop14h 34m

$612

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop13h 41m

London Heathrow

Tue 10/1

2 stops18h 36m

$617

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

2 stops13h 11m

London Heathrow

Tue 10/1

2 stops18h 36m

$619

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Mon 10/28

2 stops21h 10m

London Heathrow

Thu 11/7

2 stops34h 11m

$632

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Mon 10/28

1 stop11h 40m

London Heathrow

Thu 11/7

2 stops17h 38m

$634

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/1

1 stop12h 47m

London Heathrow

Thu 10/10

2 stops16h 53m

$643

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/1

1 stop12h 52m

London Heathrow

Thu 10/10

1 stop13h 34m

$648

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 9/25

1 stop12h 13m

London Heathrow

Sun 9/29

1 stop18h 18m

$698

Flights are sorted by cheapest first

Deals found on 6/11

What is the cheapest day to fly from Portland, Maine to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Portland to Heathrow. Price data was last updated on June 9, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland, Maine to London Heathrow Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Heathrow by month

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

LON

Temperature

39.2 - 62.6 °F

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 11, 2024.
Read reviews from past customers who have flown American Airlines, JetBlue and United Airlines from Portland to London. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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
10,277 reviews
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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
1,470 reviews
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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.

Austrian Airlines
7.7
Good
990 reviews
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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.

JetBlue
7.6
Good
4,271 reviews
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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.

United Airlines
7.4
Good
10,629 reviews
Delta
8.0
Very good
10,277 reviews

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

7.9

Entertainment

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 Portland to Heathrow. 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 Portland to London Heathrow?

    Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London Heathrow. You should not have trouble finding flights to London Heathrow from Portland; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London Heathrow. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

  • Can I find flights from Portland, Maine to London Heathrow Airport for under $600 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to London Heathrow Airport for under $600. The cheapest flight booked recently is on JetBlue for just $567, but on average you can expect to pay $649.

  • Are there last-minute flights available from Portland, Maine to London Heathrow Airport for under $1,200?

    There are currently 5+ open flights from Portland, Maine to London Heathrow Airport within the next 7 days for less than $1,200.

  • What are the cheapest airlines flying from Portland, Maine to London Heathrow Airport round-trip?

    JetBlue, at $567, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include American Airlines and Air Canada. These flights start at 40% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Portland, Maine to London Heathrow Airport one-way?

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $455. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from Portland, Maine to London Heathrow Airport for a low price.

  • What does PWM to LHR mean?

    Great question - PWM to LHR just means Portland Airport to London Heathrow Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Portland to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your Portland to Heathrow 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 Portland to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Portland to Heathrow 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 Portland to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Portland to Heathrow?

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

  • Can I find deals for business class flights from Portland to Heathrow?

    Yes. Cheapflights offers flight deals from Portland to Heathrow 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 Portland to Heathrow that allow pets onboard?

    Many airlines flying from Portland to Heathrow 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 Portland to Heathrow?

    Yes, you can often find last-minute deals on Portland to Heathrow 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 Portland, Maine to London Heathrow Airport flight deals updated?

    The Portland, Maine to London Heathrow Airport flight deals you see on this page were last updated on 6/11.

  • What are the most popular airlines that fly from Portland, Maine to London Heathrow Airport?

    Consider American Airlines, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from Portland, Maine to London Heathrow Airport.

  • What is the cheapest month to book a flight from Portland, Maine to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of $652). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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.

See more FAQs

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Alternative routes for Portland to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

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Top 3 airlines flying from Portland to Heathrow

Discover the top 3 airlines that operate flights from Portland to Heathrow. 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 3,117,830 searches. Data last updated June 11, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$652Average$886FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$679Average$896FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$686Average$1,162FlexibilityNo cancel feeOn-time71%
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Search flights from Portland to Heathrow by cabin class

Find flights from Portland to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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