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Cheap flights from Maine to London from $231

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maine to London departing on 4/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Maine to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
8:50 pm - 11:55 am
BOS
-
LHR
10h 05m
1 stop
Icelandair Logo
9:25 pm - 9:45 pm
LHR
-
BOS
29h 20m
1 stop
$525Icelandair
mer., avr. 22 - mer., avr. 29
LEVEL Logo
11:50 pm - 9:10 am
BOS
-
LHR
28h 20m
1 stop
LEVEL Logo
8:50 pm - 10:05 pm
LHR
-
BOS
30h 15m
1 stop
$545LEVEL
dim., sept. 20 - sam., sept. 26
LEVEL Logo
10:50 pm - 9:10 am
BOS
-
LHR
29h 20m
1 stop
LEVEL Logo
8:50 pm - 9:05 pm
LHR
-
BOS
29h 15m
1 stop
$549LEVEL
lun., mai 4 - jeu., mai 7
Multiple Airlines Logo
6:40 pm - 6:30 am
BOS
-
LHR
30h 50m
1 stop
Multiple Airlines Logo
6:00 am - 7:55 pm
LHR
-
BOS
18h 55m
1 stop
$557Multiple Airlines
mar., avr. 14 - ven., avr. 17
United Airlines Logo
6:00 am - 9:35 pm
PWM
-
LHR
10h 35m
1 stop
United Airlines Logo
5:50 pm - 5:44 pm
LHR
-
PWM
28h 54m
2 stops
$708United Airlines
lun., août 24 - mar., août 25
United Airlines Logo
3:44 pm - 10:40 am
PWM
-
LHR
13h 56m
2 stops
United Airlines Logo
5:50 pm - 5:44 pm
LHR
-
PWM
28h 54m
2 stops
$713United Airlines
lun., août 24 - mar., août 25
KLM Logo
5:21 am - 6:25 am
PWM
-
LHR
20h 04m
1 stop
KLM Logo
11:45 am - 12:46 am
LHR
-
PWM
18h 01m
1 stop
$723KLM
dim., avr. 19 - lun., mai 4
KLM Logo
5:02 pm - 10:20 am
BGR
-
LHR
12h 18m
1 stop
KLM Logo
6:30 am - 4:19 pm
LHR
-
BGR
14h 49m
2 stops
$723KLM
sam., avr. 25 - sam., mai 2
Delta Logo
2:51 pm - 6:20 am
PWM
-
LHR
10h 29m
1 stop
Delta Logo
9:55 am - 11:23 pm
LHR
-
PWM
18h 28m
2 stops
$727Delta
dim., avr. 19 - lun., mai 4
Delta Logo
4:43 pm - 12:05 pm
PWM
-
LHR
14h 22m
2 stops
Delta Logo
9:55 am - 12:43 am
LHR
-
PWM
19h 48m
2 stops
$728Delta
mer., mai 6 - lun., mai 11

United Airlines flights from Maine to London Heathrow Airport

Our best United Airlines deals on Maine to London Heathrow Airport flight tickets
United Airlines
Apr 22
BOS6:00 amBoston Logan Intl
10h 25m
1 stop
LHR9:25 pmLondon Heathrow
Apr 23
LHR1:50 pmLondon Heathrow
11h 05m
1 stop
BOS7:55 pmBoston Logan Intl
$573
United Airlines
Apr 26
BOS9:40 pmBoston Logan Intl
32h 40m
1 stop
LHR11:20 amLondon Heathrow
Apr 29
LHR9:30 amLondon Heathrow
10h 22m
1 stop
BOS2:52 pmBoston Logan Intl
$594
United Airlines
Apr 4
BOS6:40 pmBoston Logan Intl
21h 20m
1 stop
LHR9:00 pmLondon Heathrow
Apr 9
LHR1:50 pmLondon Heathrow
11h 05m
1 stop
BOS7:55 pmBoston Logan Intl
$692

JetBlue flights from Maine to London Heathrow Airport

Our best JetBlue deals on Maine to London Heathrow Airport flight tickets
JetBlue
Apr 2
BOS6:30 pmBoston Logan Intl
7h 00m
LHR6:30 amLondon Heathrow
Apr 6
LHR8:40 amLondon Heathrow
7h 34m
BOS11:14 amBoston Logan Intl
$704
JetBlue
May 10
PWM7:20 amPortland
21h 10m
1 stop
LHR9:30 amLondon Heathrow
May 16
LHR8:15 amLondon Heathrow
19h 48m
1 stop
PWM11:03 pmPortland
$858
JetBlue
Aug 28
PWM6:00 amPortland
9h 45m
1 stop
LHR8:45 pmLondon Heathrow
Sep 9
LHR11:55 amLondon Heathrow
15h 12m
1 stop
PWM10:07 pmPortland
$904

momondo Fare Finder

 
Customize your flight search to find flights from Maine to London Heathrow Airport 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, momondo users made 832,500 searches. Data last updated mars 28, 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 round-trip

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

mer. 4/22

8:50 pm-11:55 am

1 stop10h 05m

London Heathrow

mer. 4/29

9:25 pm-9:45 pm

1 stop29h 20m

$525

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

dim. 9/20

11:50 pm-9:10 am

1 stop28h 20m

London Heathrow

sam. 9/26

8:50 pm-10:05 pm

1 stop30h 15m

$545

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

lun. 5/4

10:50 pm-9:10 am

1 stop29h 20m

London Heathrow

jeu. 5/7

8:50 pm-9:05 pm

1 stop29h 15m

$549

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

mar. 4/14

6:40 pm-6:30 am

1 stop30h 50m

London Heathrow

ven. 4/17

6:00 am-7:55 pm

1 stop18h 55m

$557

PortlandLondon

PWM - LHR

PWMLHR

Portland

lun. 8/24

6:00 am-9:35 pm

1 stop10h 35m

London Heathrow

mar. 8/25

5:50 pm-5:44 pm

2 stops28h 54m

$708

PortlandLondon

PWM - LHR

PWMLHR

Portland

lun. 8/24

3:44 pm-10:40 am

2 stops13h 56m

London Heathrow

mar. 8/25

5:50 pm-5:44 pm

2 stops28h 54m

$713

PortlandLondon

PWM - LHR

PWMLHR

Portland

dim. 4/19

5:21 am-6:25 am

1 stop20h 04m

London Heathrow

lun. 5/4

11:45 am-12:46 am

1 stop18h 01m

$723
Quickest round-trip

BangorLondon

BGR - LHR

BGRLHR

Bangor

sam. 4/25

5:02 pm-10:20 am

1 stop12h 18m

London Heathrow

sam. 5/2

6:30 am-4:19 pm

2 stops14h 49m

$723

PortlandLondon

PWM - LHR

PWMLHR

Portland

dim. 4/19

2:51 pm-6:20 am

1 stop10h 29m

London Heathrow

lun. 5/4

9:55 am-11:23 pm

2 stops18h 28m

$727

PortlandLondon

PWM - LHR

PWMLHR

Portland

mer. 5/6

4:43 pm-12:05 pm

2 stops14h 22m

London Heathrow

lun. 5/11

9:55 am-12:43 am

2 stops19h 48m

$728

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Maine to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Maine to London Heathrow?

KLM, British Airways, and Delta are the most popular carriers operating from Maine to London Heathrow

Cheap Maine to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Maine to London Heathrow Airport

Fastest flight time

6h 30m

Direct flights

Every day
The fastest flight from Maine to London Heathrow Airport takes 6h 30m
Direct flights go from Maine to London Heathrow Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Maine to London Heathrow Airport?

    Prices for flights from Maine to London Heathrow Airport are updated daily.

  • How many operators does momondo search for flights from Maine to London Heathrow Airport?

  • How old do you have to be to fly from Maine to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Maine to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maine to London Heathrow Airport

Compare and see reviews for airlines that fly from Maine to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $648Free CancellationRating
7.4
9,499 reviews
Search United Airlines flights
American AirlinesPriceFrom $786Free CancellationRating
7.1
11,520 reviews
Search American Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Crawley
Slough
Stratford-upon-Avon
Wembley
Hayes
Croydon
Dartford
Brentwood
Guildford
Harrow
Cobham
Folkestone
Romford
Stansted
Watford

Why use momondo?

Why should I use momondo to find a flight deal from Maine to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Maine to London for you.

Can I find flights from Maine to London with flexible booking policies on momondo?

Yes. All flights to London from Maine on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Maine to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Maine.

I’m not ready to book a flight from Maine to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Maine to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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