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Heathrow

$206+ Cheap flights from Maine to Heathrow (LHR)

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Find flight deals from Maine to Heathrow

Cheapest flights from Maine to Heathrow
Explore the most affordable flight options available from Maine to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:50 pmBOS - LHR
1 stop10h 10mMultiple Airlines
Fri 11/1411:10 amLHR - BOS
1 stop12h 25mMultiple Airlines
Deal found 11/2$490
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/139:50 pmBOS - LHR
1 stop32h 25mUnited Airlines
Sun 11/169:00 amLHR - BOS
1 stop13h 50mUnited Airlines
Deal found 11/3$491
This Orbitz deal was found by Cheapflights users on 11/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/307:15 pmBOS - LHR
Nonstop6h 45mIberia
Sun 12/710:45 amLHR - BOS
1 stop14h 05mIberia
Deal found 11/1$492
This United deal was found by Cheapflights users on 11/2. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:30 amBOS - LHR
1 stop20h 10mMultiple Airlines
Sun 11/166:00 amLHR - BOS
1 stop19h 20mMultiple Airlines
Deal found 11/2$493
This United Airlines deal was found by Cheapflights users on 11/1. 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.
Sun 11/96:32 amBOS - LHR
1 stop9h 48mUnited Airlines
Wed 11/1212:05 pmLHR - BOS
1 stop13h 15mUnited Airlines
Deal found 11/1$494
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/195:30 amBOS - LHR
1 stop20h 40mUnited Airlines
Sun 11/239:00 amLHR - BOS
1 stop16h 00mUnited Airlines
Deal found 11/3$495
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/273:40 pmBOS - LHR
1 stop10h 30mUnited Airlines
Thu 1/2212:05 pmLHR - BOS
1 stop13h 15mUnited Airlines
Deal found 10/31$496
This Air Canada deal was found by Cheapflights users on 11/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:40 pmBOS - LHR
2 stops33h 40mAir Canada
Thu 11/136:00 amLHR - BOS
2 stops20h 27mAir Canada
Deal found 11/1$497
This Booking.com deal was found by Cheapflights users on 11/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/911:55 pmBOS - LHR
Nonstop6h 30mVirgin Atlantic
Sun 11/161:05 pmLHR - BOS
Nonstop7h 55mVirgin Atlantic
Deal found 11/2$498
This United Airlines deal was found by Cheapflights users on 11/1. 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 11/69:30 amBOS - LHR
1 stop16h 10mUnited Airlines
Sun 11/99:00 amLHR - BOS
1 stop16h 20mUnited Airlines
Deal found 11/1$499
This oojo deal was found by Cheapflights users on 11/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2011:35 amBOS - LHR
1 stop26h 55mIcelandair
Mon 11/248:35 pmLHR - BOS
1 stop26h 15mIcelandair
Deal found 11/2$500
This Air Canada deal was found by Cheapflights users on 11/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:15 amBOS - LHR
2 stops15h 15mAir Canada
Fri 11/219:00 amLHR - BOS
2 stops15h 12mAir Canada
Deal found 11/2$501

Cheap flight deals from Maine to Heathrow

Keep the following information in mind while searching for Maine to Heathrow flight deals. Data was last updated November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$489
(Booking.com)

One-way from

$206
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$790
Provider with most accurate pricing for Portland-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London (LON) flights.
Search Deals
From Maine to London Heathrow
Search Deals
One-way flight from Maine to London Heathrow
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 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 Maine 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 2,558,603 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Maine to London Heathrow Airport that are best for you.

Fly from

Maine

Fly to

Heathrow

Route

Depart

Return

Price

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 12/3

6:40 pm-8:35 pm

1 stop20h 55m

London Heathrow

Mon 12/8

9:00 am-8:00 pm

1 stop16h 00m

$495

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 12/2

5:30 am-7:10 am

1 stop20h 40m

London Heathrow

Mon 12/8

9:00 am-8:00 pm

1 stop16h 00m

$495

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 12/11

10:15 am-7:10 am

1 stop15h 55m

London Heathrow

Sun 12/14

1:25 pm-12:33 pm

2 stops28h 08m

$500

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 11/16

3:40 pm-7:10 am

1 stop10h 30m

London Heathrow

Sun 11/23

12:00 pm-10:39 am

2 stops27h 39m

$500

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 12/8

7:12 pm-6:55 am

Nonstop6h 43m

London Heathrow

Thu 12/11

9:20 am-12:12 pm

Nonstop7h 52m

$502

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 1/28

5:10 am-9:40 pm

1 stop11h 30m

London Heathrow

Mon 2/2

9:20 am-12:16 pm

Nonstop7h 56m

$502

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 2/5

3:40 pm-7:10 am

1 stop10h 30m

London Heathrow

Thu 2/12

9:00 am-7:42 pm

2 stops15h 42m

$503

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 11/19

11:55 pm-11:25 am

Nonstop6h 30m

London Heathrow

Mon 11/24

8:55 am-4:20 pm

1 stop12h 25m

$505

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 12/4

8:00 pm-7:50 am

Nonstop6h 50m

London Heathrow

Sun 12/7

6:20 am-4:20 pm

1 stop15h 00m

$505

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 12/8

7:10 pm-6:50 am

Nonstop6h 40m

London Heathrow

Thu 12/11

6:30 am-1:20 pm

1 stop11h 50m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 44 results
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Best time to book a flight from Maine to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Maine 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 Maine to London Heathrow Airport

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

Currently, September is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of $575). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of $1,385). 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.

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

Find hourly flight availability from Maine to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 15% on flights from Maine to London Heathrow Airport by exploring options for tickets in the evening.

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

Related info for your journey

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

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

    Departing from Maine to London Heathrow Airport will take you 6h 43m. Maine and London Heathrow Airport are separated by a distance of 3254 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Maine to London Heathrow Airport?

    Most travelers choose Boston Logan Intl - London Heathrow, Portland - London Heathrow or Bangor - London Heathrow when deciding on the best route from Maine to London Heathrow Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Maine 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.

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

    Currently, September is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of $575). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of $1,385). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Maine to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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San Francisco to Gatwick flights
Los Angeles to London City flights
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Baltimore to Gatwick flights
San Francisco to London City flights
Dallas/Fort Worth to Gatwick flights
O'Hare Intl to Gatwick flights
Reagan-National to Gatwick flights
Boston to Stansted flights
Minneapolis to Heathrow flights
O'Hare Intl to London City flights
LaGuardia to London City flights
Tampa to Heathrow flights
Dulles Intl to Stansted flights
George Bush Intcntl to Heathrow flights
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Boston to Luton flights
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Detroit to Heathrow flights

Top 3 airlines flying from Maine to Heathrow

Discover the top 3 airlines that operate flights from Maine 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 2,558,603 searches. Data last updated November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$648Average$924FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$802Average$872FlexibilityNo cancel feeOn-time71%
DeltaCheapest$825Average$963FlexibilityNo cancel feeOn-timeN/A

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