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$189+ Cheap flights from Maine to London (LON)

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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LON
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Maine to London

Cheapest flights from Maine to London
Explore the most affordable flight options available from Maine to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Mytrip deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:00 pmBOS - LTN
2 stops22h 15mMultiple Airlines
Sat 12/139:00 pmLTN - BOS
2 stops30h 37mMultiple Airlines
Deal found 12/4$507
This Delta deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:00 pmBOS - LHR
Nonstop6h 50mDelta
Sun 5/1011:45 amLHR - BOS
1 stop11h 45mDelta
Deal found 12/4$507
This Delta deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:10 pmBOS - LHR
Nonstop6h 40mDelta
Wed 12/241:05 pmLHR - BOS
Nonstop7h 55mDelta
Deal found 12/3$508
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:00 pmBOS - STN
2 stops26h 05mMultiple Airlines
Mon 12/89:45 pmSTN - BOS
2 stops25h 50mMultiple Airlines
Deal found 12/2$508
This Mytrip deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:10 pmBOS - LTN
1 stop10h 25mMultiple Airlines
Mon 12/156:00 amLTN - BOS
1 stop12h 50mMultiple Airlines
Deal found 12/3$509
This Air Canada deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:45 amBOS - LHR
2 stops15h 25mMultiple Airlines
Sat 12/69:00 amLHR - BOS
2 stops15h 12mMultiple Airlines
Deal found 12/2$509
This Ovago deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:30 amBOS - LHR
Nonstop6h 30mBritish Airways
Fri 12/1210:45 amLHR - BOS
1 stop14h 05mBritish Airways
Deal found 12/3$510
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:15 amBOS - LGW
2 stops31h 15mMultiple Airlines
Tue 12/97:55 pmLGW - BOS
2 stops25h 02mMultiple Airlines
Deal found 12/2$510
This Ovago deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:15 pmBOS - LHR
Nonstop6h 45mBritish Airways
Wed 12/1010:45 amLHR - BOS
1 stop14h 05mBritish Airways
Deal found 12/2$511
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:20 pmBOS - STN
1 stop9h 15mMultiple Airlines
Wed 12/106:30 amSTN - BOS
1 stop12h 25mMultiple Airlines
Deal found 12/2$511
This Air Canada deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:40 pmBOS - LHR
1 stop20h 55mAir Canada
Fri 1/99:00 amLHR - BOS
1 stop13h 50mAir Canada
Deal found 12/2$512
This oojo deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:05 pmBOS - LGW
1 stop10h 45mTAP AIR PORTUGAL
Thu 12/1810:40 amLGW - BOS
1 stop14h 30mTAP AIR PORTUGAL
Deal found 12/2$512

Find flight deals from Maine to London

Keep the following information in mind while searching for Maine to London flight deals. Data was last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$507
(Delta)

One-way from

$189
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$699
Provider with most accurate pricing for Portland-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London (LON) flights.
Search Deals
From Maine to London (LON)
Search Deals
One-way flight from Maine to London (LON)
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Maine to London 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 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from Maine to London that are best for you.

Fly from

Maine

Fly to

London

Route

Depart

Return

Price

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 2/22

5:30 am-9:20 am

1 stop22h 50m

London Heathrow

Mon 3/2

1:45 pm-8:00 pm

1 stop11h 15m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 2/22

3:35 pm-7:10 am

1 stop10h 35m

London Heathrow

Wed 3/4

1:45 pm-8:20 pm

1 stop11h 35m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 2/23

10:15 am-7:10 am

1 stop15h 55m

London Heathrow

Thu 3/5

1:45 pm-8:20 pm

1 stop11h 35m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 2/25

10:15 am-7:10 am

1 stop15h 55m

London Heathrow

Mon 3/2

1:45 pm-8:00 pm

1 stop11h 15m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 2/23

3:35 pm-7:10 am

1 stop10h 35m

London Heathrow

Fri 3/6

9:00 am-8:00 pm

1 stop16h 00m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 2/23

3:35 pm-7:10 am

1 stop10h 35m

London Heathrow

Wed 3/4

9:00 am-8:20 pm

1 stop16h 20m

$506

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 3/10

8:15 pm-6:55 am

Nonstop6h 40m

London Heathrow

Sun 3/22

9:20 am-1:16 pm

Nonstop7h 56m

$507

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 2/26

2:20 pm-6:40 am

1 stop11h 20m

London Heathrow

Wed 3/4

12:05 pm-8:20 pm

1 stop13h 15m

$507

BostonLondon

BOS - STN

BOSSTN

Boston Logan Intl

Sat 1/31

1:25 pm-1:05 pm

2 stops18h 40m

London Stansted

Fri 2/6

8:20 am-3:50 pm

1 stop12h 30m

$509

BostonLondon

BOS - LTN

BOSLTN

Boston Logan Intl

Thu 2/19

10:15 am-8:30 pm

3 stops29h 15m

London Luton

Mon 2/23

6:00 am-3:57 pm

2 stops14h 57m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 60 results
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Best time to book a flight from Maine to London

Have a flexible travel schedule? Discover the best time to fly to London from Maine with our price prediction graph.
Estimated round-trip 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

What is the cheapest month to book a flight from Maine to London?

Currently, September is the cheapest month in which you can book a flight from Maine to London (average of $575). Flying from Maine to London in June is currently the most expensive (average of $1,385). 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 LON?

Find hourly flight availability from Maine to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s optimal to fly from Maine to London in the evening. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Maine to London. 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?

    Airlines like United Airlines, Icelandair, and Delta fly from Maine to London in about 9h 20m. The time it takes to get you to your destination can typically vary by up to 13h 30m. Airlines will cover a distance of 3274 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Maine to London?

    Most travelers choose Boston Logan Intl - London Heathrow, Boston Logan Intl - London Gatwick or Boston Logan Intl - London City when deciding on the best route from Maine to London.

  • Can I find deals for flights from Maine to London that include hotel bookings?

    Yes. In addition to deals on Maine to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maine to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maine to London.

  • Can I find deals for business class flights from Maine to London?

    Yes. Cheapflights offers flight deals from Maine to London 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?

    Currently, September is the cheapest month in which you can book a flight from Maine to London (average of $575). Flying from Maine to London in June is currently the most expensive (average of $1,385). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Hayes
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Watford
Borehamwood
Aylesbury
Chipping Norton
Kingston upon Thames
Wembley
Folkestone
Eastbourne
Sutton

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Alternative routes for Maine to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Maine to London

Discover the top 3 airlines that operate flights from Maine to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$648Average$874FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$786Average$895FlexibilityNo cancel feeOn-time71%
DeltaCheapest$825Average$963FlexibilityNo cancel feeOn-timeN/A

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