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Cheap flights from Maine to London Heathrow Airport from £152

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
23 Jul — 30 Jul1
1 adult

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 18 July 2025.

Round-trip from

£368

One-way from

£152

Popular in

July

Cheapest in

October

Average price

£886
British Airways
  • British Airways
  • 28/10-2/11
  • 2 total stops
  • 24h 24m total
  • Maine to London
Search Deals
United Airlines
  • United Airlines
  • 18/8
  • 2 total stops
  • 18h 10m total
  • Maine to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£118 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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Find flight deals from Maine to Heathrow

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 18 July 2025.

Tue 28/1016:11BOS - LHR
1 stop11h 39mBritish Airways
Sun 2/1107:30LHR - BOS
1 stop12h 45mBritish Airways
Deal found 17/7£368
Thu 11/920:05BOS - LHR
Nonstop6h 45mIberia
Tue 16/911:30LHR - BOS
1 stop13h 20mIberia
Deal found 16/7£369
Mon 13/1018:35BOS - LHR
1 stop9h 30mAer Lingus
Sun 26/1012:10LHR - BOS
1 stop11h 45mAer Lingus
Deal found 18/7£370
Wed 10/910:20BOS - LHR
1 stop15h 10mUnited Airlines
Wed 17/913:45LHR - BOS
1 stop11h 10mUnited Airlines
Deal found 17/7£371
Thu 9/1018:20BOS - LHR
1 stop21h 40mMultiple Airlines
Sun 12/1006:00LHR - BOS
1 stop18h 55mMultiple Airlines
Deal found 16/7£372
Wed 19/1110:15BOS - LHR
2 stops15h 15mAir Canada
Wed 26/1108:55LHR - BOS
2 stops15h 17mAir Canada
Deal found 18/7£376
Thu 21/822:45BOS - LHR
Nonstop6h 45mDelta
Thu 28/806:15LHR - BOS
1 stop19h 05mDelta
Deal found 17/7£378
Sat 16/817:05BOS - LHR
1 stop11h 25mJetBlue
Sun 24/808:15LHR - BOS
1 stop14h 44mJetBlue
Deal found 18/7£380
Wed 8/1021:40BOS - LHR
1 stop10h 20mSWISS
Tue 14/1012:10LHR - BOS
1 stop12h 45mSWISS
Deal found 15/7£386
Tue 25/1120:00BOS - LHR
1 stop9h 50mIcelandair
Mon 1/1212:15LHR - BOS
1 stop10h 30mIcelandair
Deal found 17/7£390
Fri 15/806:10PWM - LHR
1 stop9h 35mJetBlue
Fri 22/811:55LHR - PWM
1 stop17h 22mJetBlue
Deal found 18/7£500
Wed 20/818:41PWM - LHR
2 stops56h 34mUnited Airlines
Sun 24/808:00LHR - PWM
1 stop20h 03mUnited Airlines
Deal found 17/7£516

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 18 July 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 28/10

16:11-07:50

1 stop11h 39m

London Heathrow

Sun 2/11

07:30-15:15

1 stop12h 45m

£368

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 11/9

20:05-07:50

Nonstop6h 45m

London Heathrow

Tue 16/9

11:30-19:50

1 stop13h 20m

£369

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 13/10

18:35-09:05

1 stop9h 30m

London Heathrow

Sun 26/10

12:10-19:55

1 stop11h 45m

£370

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 19/9

06:00-06:30

1 stop19h 30m

London Heathrow

Mon 29/9

08:40-15:25

1 stop11h 45m

£371

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 9/10

18:20-21:00

1 stop21h 40m

London Heathrow

Sun 12/10

06:00-19:55

1 stop18h 55m

£372

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 22/10

15:15-06:30

1 stop10h 15m

London Heathrow

Sun 9/11

06:50-14:52

2 stops13h 02m

£377

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 21/8

22:45-10:30

Nonstop6h 45m

London Heathrow

Thu 28/8

06:15-20:20

1 stop19h 05m

£378

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 16/8

18:40-06:30

Nonstop6h 50m

London Heathrow

Sun 24/8

08:15-17:59

1 stop14h 44m

£380

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 25/11

20:00-10:50

1 stop9h 50m

London Heathrow

Mon 1/12

12:15-17:45

1 stop10h 30m

£390

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 7/8

20:15-08:05

Nonstop6h 50m

London Heathrow

Thu 14/8

06:30-13:35

1 stop12h 05m

£398

Flights are sorted by cheapest return flights first.

Deals found on 17/7

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, January is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of £112). Flying from Maine to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

What is the cheapest time of day to fly from ME to LHR?

Find hourly flight availability from Maine to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Maine to London Heathrow Airport as you normally would.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 18 July 2025.
Get a feel of what it's like to fly with Delta, KLM, andAir France from Maine to London Heathrow Airport by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,958 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,374 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,661 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,865 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 United Airlines. You may also be able to find cheap deals on Air Canada and Icelandair, with prices starting from £154 and £154, 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, January is the cheapest month in which you can book a flight from Maine to London Heathrow Airport (average of £112). Flying from Maine to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Hounslow
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Southend-on-Sea
Folkestone
Watford
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Maine to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
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Boston to Gatwick flights
Dallas/Fort Worth to Heathrow flights
Philadelphia to Heathrow flights
Miami to Heathrow flights
Atlanta to Heathrow flights
Denver to Heathrow flights
Dulles Intl to Gatwick flights
Boston to London City flights
Orlando to Heathrow flights
Los Angeles to London City flights
Hobby to Heathrow flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Reagan-National to Heathrow flights
LaGuardia to Stansted flights
O'Hare Intl to Gatwick flights
Seattle to Gatwick flights
O'Hare Intl to London City flights
San Francisco to Gatwick flights
Los Angeles to Gatwick flights
Minneapolis to Heathrow flights
Orlando to Gatwick flights
George Bush Intcntl to Heathrow flights
Boston to Stansted flights
Reagan-National to Gatwick flights
San Francisco to London City flights
Atlanta to Gatwick flights
Boston to Luton flights
Seattle to London City flights
Austin to Heathrow flights
Detroit to Heathrow flights

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

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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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