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Cheap flights from Maine to London Heathrow Airport from £155

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
8 feb — 15 feb1
1 adult
1 adult, Economy, 0 bags

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 9 gennaio 2026.

Round-trip from

£372

One-way from

£155

Popular in

June

Cheapest in

October

Average price

£639
British Airways
  • British Airways
  • 5/5-15/5
  • Nonstop
  • 14h 10m total
  • Maine to London
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Air Canada
  • Air Canada
  • 4/2
  • 2 total stops
  • 22h 50m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£117 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 January 2026
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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 9 gennaio 2026.

mar 5/521:50BOS - LHR
Nonstop6h 45mBritish Airways
ven 15/520:10LHR - BOS
Nonstop7h 25mBritish Airways
Deal found 8/1£372
mer 22/418:30BOS - LHR
1 stop9h 35mBritish Airways
mar 28/417:35LHR - BOS
Nonstop7h 30mBritish Airways
Deal found 7/1£373
mer 15/415:17BOS - LHR
1 stop11h 03mBritish Airways
mer 22/411:00LHR - BOS
Nonstop7h 35mBritish Airways
Deal found 7/1£373
ven 6/306:00BOS - LHR
1 stop9h 00mBritish Airways
gio 12/319:10LHR - BOS
Nonstop7h 45mBritish Airways
Deal found 7/1£374
mer 6/521:30BOS - LHR
Nonstop6h 45mKLM
mar 12/506:30LHR - BOS
1 stop11h 46mKLM
Deal found 7/1£375
mer 18/320:10BOS - LHR
Nonstop6h 50mBritish Airways
ven 27/312:15LHR - BOS
1 stop15h 44mBritish Airways
Deal found 8/1£376
lun 2/219:12BOS - LHR
Nonstop6h 43mJetBlue
dom 8/209:20LHR - BOS
Nonstop8h 00mJetBlue
Deal found 7/1£376
ven 23/119:12BOS - LHR
Nonstop6h 43mJetBlue
lun 9/309:20LHR - BOS
Nonstop7h 56mJetBlue
Deal found 8/1£377
gio 16/418:40BOS - LHR
1 stop21h 20mUnited Airlines
mer 22/413:50LHR - BOS
1 stop11h 05mUnited Airlines
Deal found 6/1£378
gio 12/320:10BOS - LHR
Nonstop6h 40mDelta
mer 18/313:05LHR - BOS
Nonstop7h 55mDelta
Deal found 7/1£379
dom 3/519:30BOS - LHR
Nonstop6h 35mBritish Airways
mer 13/511:00LHR - BOS
Nonstop7h 20mBritish Airways
Deal found 7/1£379
dom 3/519:30BOS - LHR
Nonstop6h 35mBritish Airways
ven 15/520:10LHR - BOS
Nonstop7h 25mBritish Airways
Deal found 8/1£380

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 9 gennaio 2026.
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

mer 18/3

17:00-10:00

1 stop13h 00m

London Heathrow

mar 31/3

06:15-15:05

2 stops13h 50m

£372

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

mer 13/5

19:35-07:10

Nonstop6h 35m

London Heathrow

ven 29/5

09:50-15:40

1 stop10h 50m

£374

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

dom 1/3

19:12-06:55

Nonstop6h 43m

London Heathrow

sab 7/3

09:20-12:16

Nonstop7h 56m

£376

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

mer 4/3

19:12-06:55

Nonstop6h 43m

London Heathrow

lun 9/3

09:20-13:16

Nonstop7h 56m

£376

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

lun 9/3

20:15-06:55

Nonstop6h 40m

London Heathrow

ven 13/3

09:20-13:16

Nonstop7h 56m

£376

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

lun 11/5

20:15-08:00

Nonstop6h 45m

London Heathrow

mar 26/5

09:50-22:00

1 stop17h 10m

£377

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

lun 23/2

19:12-06:55

Nonstop6h 43m

London Heathrow

sab 28/2

09:20-12:19

Nonstop7h 59m

£377

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

gio 5/2

19:12-06:55

Nonstop6h 43m

London Heathrow

lun 9/2

09:20-12:20

Nonstop8h 00m

£377

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

gio 12/2

16:58-08:45

1 stop10h 47m

London Heathrow

ven 20/2

06:30-13:25

1 stop11h 55m

£378

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

sab 21/3

06:00-20:10

1 stop10h 10m

London Heathrow

mer 25/3

08:40-19:55

1 stop15h 15m

£378

Flights are sorted by cheapest return flights first.

Deals found on 8/1

Showing 1-10 of 59 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, April is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of £443). Flying from Maine to London Heathrow Airport in December is currently the most expensive (average of £1,095). 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 British Airways, 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 8h 02m. 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?

    £106 is the cheapest one-way deal found within the past few days, from Aegean Airlines. You may also be able to find cheap deals on Eurowings and Air France, with prices starting from £147 and £147, 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, April is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of £443). Flying from Maine to London Heathrow Airport in December is currently the most expensive (average of £1,095). 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
Luton
Croydon
Northampton
Slough
Hounslow
Gatwick
Ilford
Wembley
Brentford
Hayes
Colchester
Watford
Crawley
Swindon
Kingston upon Thames
Bedford
Chelmsford
Eastbourne
Romford

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

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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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