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$744+ Cheap flights from Heathrow (LHR) to Portland, ME (PWM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Heathrow to Portland

Cheapest flights from Heathrow to Portland
Explore the most affordable flight options available from Heathrow to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Virgin Atlantic deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:30 amLHR - PWM
2 stops20h 49mVirgin Atlantic
Wed 12/36:08 amPWM - LHR
1 stop19h 17mVirgin Atlantic
Deal found 11/12$818
This Virgin Atlantic deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:55 amLHR - PWM
1 stop18h 28mVirgin Atlantic
Wed 12/176:08 amPWM - LHR
2 stops19h 52mVirgin Atlantic
Deal found 11/12$821
This Finnair deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:15 amLHR - PWM
1 stop17h 31mMultiple Airlines
Wed 12/312:39 pmPWM - LHR
1 stop12h 56mMultiple Airlines
Deal found 11/12$822
This American Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1010:05 amLHR - PWM
1 stop13h 10mAmerican Airlines
Wed 12/1712:39 pmPWM - LHR
1 stop14h 11mAmerican Airlines
Deal found 11/12$840
This United Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:30 amLHR - PWM
2 stops19h 47mUnited Airlines
Wed 12/176:00 amPWM - LHR
2 stops20h 55mUnited Airlines
Deal found 11/12$990
This Justfly.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/128:40 amLHR - PWM
2 stops18h 43mVirgin Atlantic
Fri 12/196:08 amPWM - LHR
1 stop20h 42mVirgin Atlantic
Deal found 11/12$1,071
This United Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:35 amLHR - PWM
2 stops17h 16mUnited Airlines
Thu 1/110:19 amPWM - LHR
2 stops14h 36mUnited Airlines
Deal found 11/11$1,201
This American Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:10 pmLHR - PWM
2 stops25h 03mAmerican Airlines
Wed 11/1912:38 pmPWM - LHR
2 stops15h 37mAmerican Airlines
Deal found 11/11$1,227

Cheap flight deals from Heathrow to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Portland (PWM). 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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$744
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$739
Provider with most accurate pricing for London Heathrow-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Portland flights.
Search Deals
From London Heathrow to Portland
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Portland 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 2,558,603 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Portland that are best for you.

Fly from

Heathrow

Fly to

Portland

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 2/4

11:10 am-11:30 pm

2 stops17h 20m

Portland

Wed 2/18

3:05 pm-10:50 am

2 stops14h 45m

$744

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 1/8

7:30 am-6:52 pm

2 stops16h 22m

Portland

Thu 1/22

2:31 pm-10:25 am

2 stops14h 54m

$787

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 11/26

6:30 am-10:19 pm

2 stops20h 49m

Portland

Wed 12/3

6:08 am-7:50 am

2 stops20h 42m

$818

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 12/10

8:55 am-10:23 pm

1 stop18h 28m

Portland

Wed 12/17

6:08 am-7:00 am

2 stops19h 52m

$821

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 11/26

10:15 am-10:46 pm

1 stop17h 31m

Portland

Wed 12/3

12:39 pm-6:35 am

1 stop12h 56m

$822

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 12/10

10:05 am-6:15 pm

1 stop13h 10m

Portland

Wed 12/17

12:39 pm-7:50 am

1 stop14h 11m

$840

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 12/10

6:30 am-9:17 pm

2 stops19h 47m

Portland

Wed 12/17

6:00 am-7:55 am

2 stops20h 55m

$990

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 12/12

8:40 am-10:23 pm

2 stops18h 43m

Portland

Fri 12/19

6:08 am-7:50 am

1 stop20h 42m

$1,071

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 2/4

11:10 am-11:30 pm

2 stops17h 20m

Portland

Wed 2/18

6:00 am-6:30 am

3 stops19h 30m

$1,121

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 12/26

6:50 am-2:40 pm

2 stops36h 50m

$808

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 19 results
1
2

Compare providers for flights from Heathrow to Portland

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Portland in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Portland, Maine flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-Portland, Maine flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Portland, Maine flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Portland, Maine flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Heathrow 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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Portland

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of $424). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of $502). 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.

How much does it cost to fly round-trip from London Heathrow Airport to Portland, Maine?

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Portland. 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 into for flights to Portland from London Heathrow?

    Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from London Heathrow. Booking flights from London Heathrow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

  • How long is the flight from London Heathrow Airport to Portland, Maine?

    There are many flights that can get you from London Heathrow Airport to Portland, Maine in 17h 20m. Fly via United Airlines or Virgin Atlantic to get the fastest option. The distance between London Heathrow Airport and Portland, Maine is about 3173 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $808. Austrian Airlines flights start at $809 while deals on WestJet start at $1,070 one-way.

  • Can I find deals for flights from Heathrow to Portland that include hotel bookings?

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of $424). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of $502). 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

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Brunswick
Auburn
Conway

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