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Cheap flights from Maine to London Heathrow Airport from £158

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
5 Dec — 12 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 5 November 2025.

Sun 9/1121:50BOS - LHR
1 stop10h 10mSWISS
Wed 12/1112:05LHR - BOS
1 stop13h 15mSWISS
Deal found 3/11£375
Wed 3/1219:50BOS - LHR
1 stop18h 40mIcelandair
Tue 13/112:15LHR - BOS
1 stop10h 35mIcelandair
Deal found 3/11£376
Fri 12/1219:15BOS - LHR
Nonstop6h 45mIberia
Mon 15/1211:25LHR - BOS
1 stop13h 25mIberia
Deal found 3/11£376
Sat 8/1105:30BOS - LHR
1 stop20h 10mMultiple Airlines
Fri 14/1106:00LHR - BOS
1 stop19h 20mMultiple Airlines
Deal found 3/11£377
Tue 18/1121:50BOS - LHR
1 stop10h 10mSWISS
Sun 23/1109:00LHR - BOS
1 stop16h 00mSWISS
Deal found 3/11£378
Wed 19/1105:30BOS - LHR
1 stop20h 40mUnited Airlines
Sun 23/1109:00LHR - BOS
1 stop16h 00mUnited Airlines
Deal found 3/11£379
Thu 13/1115:40BOS - LHR
1 stop10h 30mMultiple Airlines
Tue 18/1109:00LHR - BOS
2 stops15h 12mMultiple Airlines
Deal found 3/11£379
Mon 8/1219:50BOS - LHR
1 stop10h 00mIcelandair
Wed 7/112:15LHR - BOS
1 stop10h 35mIcelandair
Deal found 3/11£380
Sun 9/1123:55BOS - LHR
Nonstop6h 30mVirgin Atlantic
Tue 18/1113:05LHR - BOS
Nonstop7h 55mVirgin Atlantic
Deal found 3/11£381
Fri 7/1119:55BOS - LHR
1 stop10h 10mUnited Airlines
Wed 12/1113:45LHR - BOS
1 stop11h 35mUnited Airlines
Deal found 4/11£382
Thu 20/1111:35BOS - LHR
1 stop26h 55mIcelandair
Mon 24/1120:35LHR - BOS
1 stop26h 15mIcelandair
Deal found 4/11£382
Sun 16/1110:45BOS - LHR
2 stops15h 25mAir Canada
Wed 19/1109:00LHR - BOS
2 stops15h 12mAir Canada
Deal found 4/11£383

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 5 November 2025.

Round-trip from

£374

One-way from

£158

Popular in

June

Cheapest in

October

Average price

£604
Aer Lingus
  • Aer Lingus
  • 17/1-25/1
  • 2 total stops
  • 23h 50m total
  • Maine to London
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 20/1
  • 2 total stops
  • 19h 35m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£105 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£19 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 5 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

Fri 5/12

15:40-07:10

1 stop10h 30m

London Heathrow

Fri 12/12

13:45-20:00

1 stop11h 15m

£379

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 20/2

19:12-06:55

Nonstop6h 43m

London Heathrow

Sun 1/3

09:20-12:16

Nonstop7h 56m

£384

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 2/12

20:00-07:50

Nonstop6h 50m

London Heathrow

Tue 9/12

09:00-16:20

1 stop12h 20m

£386

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 3/12

20:00-07:50

Nonstop6h 50m

London Heathrow

Wed 10/12

08:55-16:20

1 stop12h 25m

£386

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 5/12

19:10-06:50

Nonstop6h 40m

London Heathrow

Tue 9/12

09:00-16:20

1 stop12h 20m

£386

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 7/12

18:55-06:30

Nonstop6h 35m

London Heathrow

Sat 13/12

17:05-19:45

Nonstop7h 40m

£392

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 2/12

15:40-07:10

1 stop10h 30m

London Heathrow

Tue 9/12

06:50-17:16

2 stops15h 26m

£392

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 16/11

19:10-06:50

Nonstop6h 40m

London Heathrow

Thu 20/11

13:05-16:00

Nonstop7h 55m

£392

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 4/12

19:10-06:50

Nonstop6h 40m

London Heathrow

Sun 7/12

19:40-22:15

Nonstop7h 35m

£392

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 9/12

16:46-08:45

1 stop10h 59m

London Heathrow

Sun 14/12

09:40-12:30

Nonstop7h 50m

£395

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 41 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 £440). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of £1,059). 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 for a return flight 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?

    Airlines like United Airlines, JetBlue, and Delta fly from Maine to London Heathrow Airport in about 6h 43m. The time it takes to get you to your destination can typically vary by up to 3h 47m. 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?

    £171 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from £171 and £171, 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 £440). Flying from Maine to London Heathrow Airport in June is currently the most expensive (average of £1,059). 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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Boston to London City flights
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Dulles Intl to Gatwick flights
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Dulles Intl to London City flights
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Boston to Stansted flights
San Francisco to Gatwick flights
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Baltimore to Gatwick flights
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O'Hare Intl to Gatwick flights
Hobby to Heathrow flights
Boston to Luton flights
Los Angeles to London City flights
O'Hare Intl to London City flights
San Francisco to London City flights
Dallas/Fort Worth to Gatwick flights
Minneapolis to Heathrow flights
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Detroit to Heathrow flights
Dulles Intl to Luton flights
Charlotte to Heathrow flights
Los Angeles to Stansted flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Maine today with Cheapflights!

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.

Can Cheapflights notify me if prices for flights from Maine to Heathrow become cheaper?

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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