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Cheap flights from Maine to London Heathrow Airport from £147

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
26 Dec — 2 Jan1
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 26 November 2025.

Mon 8/1219:15BOS - LHR
Nonstop6h 45mBritish Airways
Fri 12/1210:45LHR - BOS
1 stop14h 05mBritish Airways
Deal found 25/11£387
Wed 31/1220:00BOS - LHR
Nonstop6h 50mDelta
Mon 12/109:40LHR - BOS
Nonstop7h 50mDelta
Deal found 24/11£388
Fri 5/1219:15BOS - LHR
Nonstop6h 45mFinnair
Sun 7/1213:30LHR - BOS
Nonstop7h 30mFinnair
Deal found 24/11£389
Sun 7/1209:00BOS - LHR
1 stop18h 45mDelta
Tue 16/1209:40LHR - BOS
Nonstop7h 50mDelta
Deal found 25/11£390
Thu 27/1116:45BOS - LHR
1 stop10h 40mIberia
Wed 3/1213:30LHR - BOS
Nonstop7h 30mIberia
Deal found 24/11£390
Wed 31/1211:10BOS - LHR
1 stop14h 55mDelta
Sat 10/113:05LHR - BOS
Nonstop7h 55mDelta
Deal found 24/11£391
Sat 6/1216:46BOS - LHR
1 stop11h 19mMultiple Airlines
Fri 12/1216:00LHR - BOS
Nonstop7h 35mMultiple Airlines
Deal found 24/11£392
Thu 11/1213:05BOS - LHR
1 stop14h 40mDelta
Sun 14/1213:05LHR - BOS
Nonstop7h 55mDelta
Deal found 25/11£393
Tue 2/1215:40BOS - LHR
1 stop10h 30mUnited Airlines
Sat 6/1209:00LHR - BOS
2 stops14h 02mUnited Airlines
Deal found 24/11£393
Tue 9/1210:15BOS - LHR
2 stops17h 15mAir Canada
Sat 13/1213:25LHR - BOS
1 stop11h 17mAir Canada
Deal found 25/11£394
Sat 13/1218:40BOS - LHR
1 stop20h 55mMultiple Airlines
Wed 17/1206:00LHR - BOS
1 stop19h 20mMultiple Airlines
Deal found 25/11£395
Tue 30/1219:10BOS - LHR
Nonstop6h 40mVirgin Atlantic
Fri 9/120:00LHR - BOS
1 stop17h 28mVirgin Atlantic
Deal found 24/11£396

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 26 November 2025.

Round-trip from

£387

One-way from

£147

Popular in

June

Cheapest in

October

Average price

£647
Air Canada
  • Air Canada
  • 9/1-18/1
  • 3 total stops
  • 23h 32m total
  • Maine to London
Search Deals
SWISS
  • SWISS
  • 1/12
  • 1 total stop
  • 13h 10m 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 26 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

Tue 30/12

19:10-06:50

Nonstop6h 40m

London Heathrow

Fri 9/1

09:40-12:30

Nonstop7h 50m

£388

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 6/12

15:40-07:10

1 stop10h 30m

London Heathrow

Sat 13/12

09:00-17:50

1 stop13h 50m

£389

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 2/2

20:00-07:50

Nonstop6h 50m

London Heathrow

Tue 10/2

06:20-13:40

1 stop12h 20m

£389

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 27/2

19:15-06:50

Nonstop6h 35m

London Heathrow

Wed 11/3

06:20-14:30

1 stop12h 10m

£389

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 28/1

20:00-07:50

Nonstop6h 50m

London Heathrow

Sat 14/2

08:55-16:20

1 stop12h 25m

£390

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 3/2

06:00-20:10

1 stop9h 10m

London Heathrow

Sat 14/2

08:55-16:20

1 stop12h 25m

£393

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 1/2

17:05-08:05

1 stop10h 00m

London Heathrow

Sun 15/2

11:45-18:55

1 stop12h 10m

£393

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 17/4

18:40-21:00

1 stop21h 20m

London Heathrow

Fri 24/4

07:25-17:40

1 stop15h 15m

£397

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 26/3

20:10-06:50

Nonstop6h 40m

London Heathrow

Tue 14/4

09:00-15:05

1 stop11h 05m

£401

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 26/4

23:10-11:00

Nonstop6h 50m

London Heathrow

Sat 2/5

14:45-20:20

1 stop10h 35m

£401

Flights are sorted by cheapest return flights first.

Deals found on 25/11

Showing 1-10 of 33 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 £1,054). 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 Delta, United Airlines, and Scandinavian 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 13h 45m. 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?

    £152 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 Iberia and United Airlines, with prices starting from £153 and £170, 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 £1,054). 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
Slough
Croydon
Hounslow
Northampton
Gatwick
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Brentford
Winchester
Swindon
Crawley
Romford
Chichester
Bedford

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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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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