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Cheap flights from Maine to London Heathrow Airport from £187

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
5 May — 12 May1
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 5 April 2026.

Wed 6/523:15
BOS
-
LHR
2 stops18h 40m
TAP AIR PORTUGAL
Thu 14/506:00
LHR
-
BOS
1 stop19h 20m
TAP AIR PORTUGAL
Deal found 1/4£440
Wed 29/423:15
BOS
-
LHR
2 stops13h 30m
TAP AIR PORTUGAL
Wed 6/506:00
LHR
-
BOS
1 stop19h 20m
TAP AIR PORTUGAL
Deal found 3/4£441
Sun 26/422:30
BOS
-
LHR
2 stops19h 25m
TAP AIR PORTUGAL
Tue 5/519:50
LHR
-
BOS
1 stop29h 30m
TAP AIR PORTUGAL
Deal found 1/4£445
Wed 6/523:15
BOS
-
LHR
2 stops17h 45m
TAP AIR PORTUGAL
Wed 13/518:45
LHR
-
BOS
1 stop30h 35m
TAP AIR PORTUGAL
Deal found 31/3£446
Sun 6/921:40
BOS
-
LHR
1 stop10h 20m
Multiple Airlines
Tue 8/910:50
LHR
-
BOS
1 stop11h 50m
Multiple Airlines
Deal found 1/4£460
Tue 12/520:05
BOS
-
LHR
1 stop11h 45m
Multiple Airlines
Thu 14/512:10
LHR
-
BOS
1 stop12h 45m
Multiple Airlines
Deal found 31/3£460
Sun 10/523:00
BOS
-
LHR
2 stops18h 55m
TAP AIR PORTUGAL
Wed 20/506:00
LHR
-
BOS
1 stop19h 20m
TAP AIR PORTUGAL
Deal found 4/4£463
Thu 23/423:00
BOS
-
LHR
2 stops17h 20m
Multiple Airlines
Thu 30/406:40
LHR
-
BOS
2 stops20h 05m
Multiple Airlines
Deal found 3/4£465
Fri 1/518:40
BOS
-
LHR
1 stop21h 20m
Air Canada
Fri 8/508:40
LHR
-
BOS
2 stops17h 47m
Air Canada
Deal found 1/4£466
Mon 4/505:21
PWM
-
LHR
1 stop20h 04m
Virgin Atlantic
Mon 11/513:25
LHR
-
PWM
1 stop14h 44m
Virgin Atlantic
Deal found 3/4£538
Mon 4/512:46
PWM
-
LHR
1 stop13h 24m
KLM
Mon 11/511:45
LHR
-
PWM
2 stops17h 58m
KLM
Deal found 3/4£541
Sat 2/514:51
PWM
-
LHR
1 stop12h 59m
KLM
Sat 9/511:20
LHR
-
PWM
1 stop18h 23m
KLM
Deal found 4/4£547

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 5 April 2026.

Round-trip from

£440

One-way from

£187

Popular in

July

Cheapest in

October

Average price

£648
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 6/5-14/5
  • 3 total stops
  • 38h 00m total
  • Maine to London
Search Deals
26/4
  • 26/4
  • 2 total stops
  • 14h 35m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£132 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£46 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 5 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

Wed 16/9

14:35-10:20

1 stop14h 45m

London Heathrow

Wed 30/9

09:55-23:59

2 stops19h 04m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/5

14:38-12:05

1 stop16h 27m

London Heathrow

Mon 11/5

09:55-00:43

2 stops19h 48m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 11/9

14:35-12:05

1 stop16h 30m

London Heathrow

Tue 29/9

08:55-23:59

2 stops20h 04m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

14:51-10:20

1 stop14h 29m

London Heathrow

Mon 11/5

11:30-00:43

2 stops18h 13m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 29/4

14:51-08:50

1 stop12h 59m

London Heathrow

Wed 6/5

08:55-00:46

2 stops20h 51m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/5

14:38-06:45

1 stop11h 07m

London Heathrow

Wed 13/5

09:55-23:12

2 stops18h 17m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 10/5

14:38-06:20

1 stop10h 42m

London Heathrow

Sat 16/5

06:15-00:43

2 stops23h 28m

£549

BangorLondon

BGR - LHR

BGRLHR

Bangor

Tue 28/4

17:07-12:05

1 stop13h 58m

London Heathrow

Wed 13/5

08:20-15:47

1 stop12h 27m

£553

BangorLondon

BGR - LHR

BGRLHR

Bangor

Tue 28/4

17:07-12:05

1 stop13h 58m

London Heathrow

Tue 12/5

08:20-15:47

1 stop12h 27m

£553

BangorLondon

BGR - LHR

BGRLHR

Bangor

Sat 26/9

14:40-13:05

2 stops17h 25m

London Heathrow

Sat 10/10

12:25-13:35

2 stops30h 10m

£557

Flights are sorted by cheapest return flights first.

Deals found on 3/4

Showing 1-10 of 46 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, LEVEL, and United Airlines fly from Maine to London Heathrow Airport in about 16h 27m. The time it takes to get you to your destination can typically vary by up to 12h 53m. Maine and London Heathrow Airport are separated by a distance of 3173 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?

    £90 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 £108 and £149, 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
Northampton
Hounslow
Gatwick
Luton
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

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