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Cheap flights from Maine to London Heathrow Airport from £182

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
25 May — 1 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap 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 25 April 2026.

Thu 24/923:00
BOS
-
LHR
1 stop29h 10m
LEVEL
Sun 27/909:55
LHR
-
BOS
1 stop17h 10m
LEVEL
Deal found 20/4£411
Sun 27/923:50
BOS
-
LHR
1 stop15h 15m
LEVEL
Sat 10/1020:50
LHR
-
BOS
1 stop30h 15m
LEVEL
Deal found 20/4£420
Thu 10/923:00
BOS
-
LHR
1 stop16h 05m
LEVEL
Tue 15/920:50
LHR
-
BOS
1 stop29h 25m
LEVEL
Deal found 21/4£435
Sun 20/923:50
BOS
-
LHR
1 stop28h 20m
LEVEL
Thu 1/1009:55
LHR
-
BOS
1 stop16h 20m
LEVEL
Deal found 21/4£437
Mon 18/520:50
BOS
-
LHR
1 stop10h 05m
Icelandair
Wed 27/521:25
LHR
-
BOS
1 stop29h 20m
Icelandair
Deal found 20/4£439
Wed 16/923:00
BOS
-
LHR
1 stop29h 10m
LEVEL
Sat 26/920:50
LHR
-
BOS
1 stop30h 15m
LEVEL
Deal found 20/4£441
Wed 7/1023:00
BOS
-
LHR
1 stop29h 10m
LEVEL
Wed 21/1020:50
LHR
-
BOS
1 stop29h 25m
LEVEL
Deal found 24/4£444
Wed 7/1023:00
BOS
-
LHR
1 stop29h 10m
LEVEL
Sat 17/1020:50
LHR
-
BOS
1 stop30h 15m
LEVEL
Deal found 23/4£448
Wed 13/520:05
BOS
-
LHR
1 stop14h 35m
Multiple Airlines
Fri 15/513:50
LHR
-
BOS
1 stop11h 05m
Multiple Airlines
Deal found 22/4£450
Wed 16/923:00
BOS
-
LHR
1 stop29h 10m
LEVEL
Sun 20/909:55
LHR
-
BOS
1 stop17h 10m
LEVEL
Deal found 25/4£451
Sun 13/923:50
BOS
-
LHR
1 stop28h 20m
LEVEL
Thu 17/909:55
LHR
-
BOS
1 stop16h 20m
LEVEL
Deal found 21/4£455
Tue 10/1106:30
PWM
-
LHR
1 stop20h 35m
Delta
Tue 17/1108:55
LHR
-
PWM
2 stops19h 54m
Delta
Deal found 21/4£540

Find flight deals from Maine to Heathrow

Keep the following information in mind while searching for Maine to Heathrow flight deals. Data was last updated 25 April 2026.

Round-trip from

£411

One-way from

£182

Popular in

July

Cheapest in

October

Average price

£634
LEVEL
  • LEVEL
  • 24/9-27/9
  • 2 total stops
  • 46h 20m total
  • Maine to London
Search Deals
Icelandair
  • Icelandair
  • 18/5
  • 1 total stop
  • 10h 05m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£140 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£45 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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 25 April 2026.
Use the filters below to find and compare flights from Maine to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 10/5

14:38-06:20

1 stop10h 42m

London Heathrow

Sat 16/5

06:15-23:09

2 stops21h 54m

£540

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 1/9

14:35-07:15

1 stop11h 40m

London Heathrow

Sun 6/9

08:40-22:33

2 stops18h 53m

£540

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

14:51-06:20

1 stop10h 29m

London Heathrow

Mon 11/5

09:55-23:09

2 stops18h 14m

£540

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 30/9

13:35-13:15

1 stop18h 40m

London Heathrow

Wed 7/10

11:15-22:23

1 stop16h 08m

£545

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 5/5

12:46-07:10

1 stop13h 24m

London Heathrow

Sun 10/5

15:50-00:43

1 stop13h 53m

£545

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 18/8

13:35-13:15

1 stop18h 40m

London Heathrow

Tue 1/9

09:20-22:33

1 stop18h 13m

£545

BangorLondon

BGR - LHR

BGRLHR

Bangor

Tue 1/9

15:00-06:45

1 stop10h 45m

London Heathrow

Mon 14/9

08:40-14:23

2 stops34h 43m

£546

BangorLondon

BGR - LHR

BGRLHR

Bangor

Sat 26/9

15:00-07:15

1 stop11h 15m

London Heathrow

Sat 10/10

12:25-13:35

2 stops30h 10m

£548

BangorLondon

BGR - LHR

BGRLHR

Bangor

Sat 26/9

14:40-11:20

1 stop15h 40m

London Heathrow

Sat 10/10

18:35-14:21

1 stop24h 46m

£550

BangorLondon

BGR - LHR

BGRLHR

Bangor

Tue 1/9

15:00-06:45

1 stop10h 45m

London Heathrow

Tue 15/9

15:50-14:23

1 stop27h 33m

£551

Flights are sorted by cheapest return flights first.

Deals found on 23/4

Showing 1-10 of 49 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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, KLM, and British Airways fly from Maine to London Heathrow Airport in about 6h 30m. The time it takes to get you to your destination can typically vary by up to 4h 37m. 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?

    £88 is the cheapest one-way deal found within the past few days, from Air France. You may also be able to find cheap deals on Aegean Airlines and Eurowings, with prices starting from £105 and £146, 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.

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
Wembley
Croydon
Hounslow
Northampton
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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 Gatwick flights
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Newark to London City flights
Seattle to Heathrow flights
Newark to Luton flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
LaGuardia to Stansted flights
Hobby to Heathrow flights
Boston to London City flights
Dulles Intl to Gatwick flights
Los Angeles to Gatwick flights
Reagan-National to Heathrow flights
Miami to Heathrow flights
Los Angeles to Stansted flights
Boston to Stansted flights
Denver to Heathrow flights
Dulles Intl to London City flights
Los Angeles to London City flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Philadelphia to Heathrow flights
O'Hare Intl to Stansted flights
San Francisco to London City flights
San Francisco to Stansted flights
Orlando to Gatwick flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to London City flights
Minneapolis to Heathrow flights
Tampa to Heathrow 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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