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Cheap flights from Maine to London Heathrow Airport from £148

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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Maine to Heathrow

Enter your travel dates to find the best prices.

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 19 November 2025.

Mon 1/1215:40BOS - LHR
2 stops23h 55mAir Canada
Thu 11/1206:50LHR - BOS
2 stops13h 02mAir Canada
Deal found 17/11£382
Tue 18/1119:25BOS - LHR
Nonstop6h 35mIberia
Fri 21/1119:40LHR - BOS
1 stop29h 10mIberia
Deal found 17/11£382
Tue 30/1205:20BOS - LHR
1 stop24h 30mUnited Airlines
Fri 9/111:10LHR - BOS
1 stop27h 52mUnited Airlines
Deal found 16/11£383
Thu 4/1219:10BOS - LHR
Nonstop6h 40mDelta
Tue 9/1206:20LHR - BOS
1 stop12h 15mDelta
Deal found 17/11£384
Mon 17/1120:00BOS - LHR
Nonstop6h 50mDelta
Sun 23/1106:20LHR - BOS
1 stop12h 20mDelta
Deal found 16/11£385
Tue 9/1215:40BOS - LHR
1 stop12h 50mJetBlue
Thu 18/1209:20LHR - BOS
Nonstop7h 52mJetBlue
Deal found 16/11£385
Mon 24/1119:10BOS - LHR
Nonstop6h 40mDelta
Fri 28/1106:30LHR - BOS
1 stop11h 50mDelta
Deal found 17/11£386
Mon 1/1215:40BOS - LHR
1 stop10h 30mMultiple Airlines
Mon 8/1207:00LHR - BOS
2 stops17h 42mMultiple Airlines
Deal found 18/11£387
Mon 1/1209:15BOS - LHR
1 stop16h 10mDelta
Mon 8/1209:00LHR - BOS
1 stop12h 20mDelta
Deal found 18/11£388
Wed 31/1220:00BOS - LHR
Nonstop6h 50mDelta
Mon 12/113:05LHR - BOS
Nonstop7h 55mDelta
Deal found 18/11£389
Wed 19/1123:55BOS - LHR
Nonstop6h 30mDelta
Sat 13/1209:40LHR - BOS
Nonstop7h 50mDelta
Deal found 17/11£389
Mon 24/1119:55BOS - LHR
1 stop10h 10mUnited Airlines
Wed 3/1209:00LHR - BOS
1 stop13h 50mUnited Airlines
Deal found 17/11£390

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 19 November 2025.

Round-trip from

£382

One-way from

£148

Popular in

June

Cheapest in

October

Average price

£646
United Airlines
  • United Airlines
  • 28/1-10/2
  • 2 total stops
  • 22h 05m total
  • Maine to London
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 7/2
  • 1 total stop
  • 11h 13m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£106 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 19 November 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

Sat 14/2

18:40-20:35

1 stop20h 55m

London Heathrow

Thu 19/2

06:35-18:35

1 stop17h 00m

£385

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 28/1

19:10-06:50

Nonstop6h 40m

London Heathrow

Tue 24/2

06:20-16:20

1 stop15h 00m

£390

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 25/2

19:15-06:50

Nonstop6h 35m

London Heathrow

Sat 7/3

09:00-16:20

1 stop12h 20m

£390

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 10/12

16:46-08:45

1 stop10h 59m

London Heathrow

Tue 16/12

09:40-12:30

Nonstop7h 50m

£393

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 16/1

19:10-06:50

Nonstop6h 40m

London Heathrow

Sun 8/2

09:40-12:30

Nonstop7h 50m

£394

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 7/3

07:30-19:00

Nonstop6h 30m

London Heathrow

Wed 11/3

17:05-20:45

Nonstop7h 40m

£395

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 22/3

20:10-06:50

Nonstop6h 40m

London Heathrow

Tue 14/4

06:30-13:35

1 stop12h 05m

£401

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 7/5

21:50-09:35

Nonstop6h 45m

London Heathrow

Sun 17/5

17:35-20:05

Nonstop7h 30m

£407

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 28/3

19:05-05:45

Nonstop6h 40m

London Heathrow

Mon 6/4

13:15-16:10

Nonstop7h 55m

£407

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 23/3

13:10-09:20

2 stops16h 10m

London Heathrow

Tue 31/3

07:05-15:35

2 stops13h 30m

£413

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 42 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 return 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 £437). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of £1,053). 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.

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?

    Airlines like United Airlines, Delta, and American Airlines fly from Maine to London Heathrow Airport in about 6h 40m. The time it takes to get you to your destination can typically vary by up to 14h 15m. Maine and London Heathrow Airport are separated by a distance of 3254 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    £153 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Austrian Airlines and Scandinavian Airlines, with prices starting from £161 and £168, respectively.

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

    The most popular flight routes from Maine to London Heathrow Airport are Boston Logan Intl - London Heathrow, Portland - London Heathrow and Bangor - London Heathrow.

  • 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 holiday 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 £437). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of £1,053). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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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Dulles Intl to London City flights
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Los Angeles to London City flights
Boston to Stansted flights
Baltimore to Gatwick flights
San Francisco to Gatwick flights
Philadelphia to Heathrow flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
O'Hare Intl to London City flights
Boston to Luton flights
Minneapolis to Heathrow flights
San Francisco to London City flights
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Los Angeles to Stansted flights
Dallas/Fort Worth to Gatwick flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Maine to Heathrow?

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Why should you use Cheapflights to find cheap flight tickets from Maine to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Maine to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Maine to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from Maine shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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