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Cheap flights from London Heathrow Airport to Portland from $523

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Portland departing on 4/29. 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 London Heathrow Airport to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
11:55 am - 1:23 pm
LHR
-
PWM
30h 28m
1 stop
JetBlue Logo
2:18 pm - 8:45 pm
PWM
-
LHR
25h 27m
1 stop
$668JetBlue
Fri, May 15 - Sun, May 17
Delta Logo
11:45 am - 11:59 pm
LHR
-
PWM
17h 14m
2 stops
Delta Logo
2:35 pm - 2:35 pm
PWM
-
LHR
19h 00m
1 stop
$791Delta
Fri, May 15 - Sun, May 17
Multiple Airlines Logo
1:05 pm - 11:36 pm
LHR
-
PWM
15h 31m
2 stops
Multiple Airlines Logo
6:00 am - 8:20 pm
PWM
-
LHR
33h 20m
2 stops
$792Multiple Airlines
Fri, May 15 - Sun, May 17
Multiple Airlines Logo
8:00 am - 6:25 pm
LHR
-
PWM
14h 25m
1 stop
Multiple Airlines Logo
11:30 am - 8:35 pm
PWM
-
LHR
29h 05m
1 stop
$845Multiple Airlines
Sun, Mar 15 - Sun, Mar 22
United Airlines Logo
6:50 am - 6:25 pm
LHR
-
PWM
15h 35m
2 stops
United Airlines Logo
2:32 pm - 10:50 am
PWM
-
LHR
16h 18m
1 stop
$857United Airlines
Sat, Mar 14 - Sat, Mar 21
Multiple Airlines Logo
8:25 pm - 11:59 pm
LHR
-
PWM
31h 34m
2 stops
Multiple Airlines Logo
5:23 am - 7:00 am
PWM
-
LHR
45h 37m
2 stops
$876Multiple Airlines
Sun, Mar 15 - Sun, Mar 22
Virgin Atlantic Logo
10:45 am - 11:22 pm
LHR
-
PWM
16h 37m
1 stop
Virgin Atlantic Logo
5:23 am - 7:00 am
PWM
-
LHR
45h 37m
2 stops
$879Virgin Atlantic
Sun, Mar 15 - Sun, Mar 22
United Airlines Logo
7:40 am - 9:11 pm
LHR
-
PWM
17h 31m
1 stop
United Airlines Logo
7:08 pm - 10:25 am
PWM
-
LHR
11h 17m
1 stop
$888United Airlines
Sat, Mar 14 - Sat, Mar 21
Multiple Airlines Logo
8:15 am - 10:49 am
LHR
-
PWM
30h 34m
3 stops
Multiple Airlines Logo
7:09 pm - 5:30 pm
PWM
-
LHR
18h 21m
2 stops
$1,228Multiple Airlines
Sun, Mar 15 - Sun, Mar 22
Multiple Airlines Logo
8:15 am - 10:51 pm
LHR
-
PWM
18h 36m
2 stops
Multiple Airlines Logo
7:08 pm - 9:35 pm
PWM
-
LHR
22h 27m
3 stops
$1,332Multiple Airlines
Sat, Mar 14 - Sat, Mar 21

Scandinavian Airlines flights from London Heathrow Airport to Portland, Maine

Our best Scandinavian Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
Scandinavian Airlines
May 15
LHR10:20 amLondon Heathrow
18h 39m
2 stops
PWM11:59 pmPortland
May 17
PWM2:35 pmPortland
19h 00m
3 stops
LHR2:35 pmLondon Heathrow
$1,540
Scandinavian Airlines
May 15
LHR6:40 amLondon Heathrow
22h 19m
3 stops
PWM11:59 pmPortland
May 17
PWM2:35 pmPortland
19h 00m
3 stops
LHR2:35 pmLondon Heathrow
$1,547

United Airlines flights from London Heathrow Airport to Portland, Maine

Our best United Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
United Airlines
Mar 14
LHR6:50 amLondon Heathrow
15h 35m
2 stops
PWM6:25 pmPortland
Mar 21
PWM2:32 pmPortland
16h 18m
1 stop
LHR10:50 amLondon Heathrow
$857
United Airlines
Feb 5
LHR8:00 amLondon Heathrow
15h 52m
2 stops
PWM6:52 pmPortland
Feb 9
PWM3:12 pmPortland
12h 13m
1 stop
LHR8:25 amLondon Heathrow
$865
United Airlines
Mar 14
LHR7:40 amLondon Heathrow
17h 31m
1 stop
PWM9:11 pmPortland
Mar 21
PWM7:08 pmPortland
11h 17m
1 stop
LHR10:25 amLondon Heathrow
$888

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Portland, Maine 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 January 29, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 5/15

11:55 am-1:23 pm

1 stop30h 28m

Portland

Sun 5/17

2:18 pm-8:45 pm

1 stop25h 27m

$668

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 5/15

11:45 am-11:59 pm

2 stops17h 14m

Portland

Sun 5/17

2:35 pm-2:35 pm

1 stop19h 00m

$791

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 5/15

1:05 pm-11:36 pm

2 stops15h 31m

Portland

Sun 5/17

6:00 am-8:20 pm

2 stops33h 20m

$792

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 3/15

8:00 am-6:25 pm

1 stop14h 25m

Portland

Sun 3/22

11:30 am-8:35 pm

1 stop29h 05m

$845

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

6:50 am-6:25 pm

2 stops15h 35m

Portland

Sat 3/21

2:32 pm-10:50 am

1 stop16h 18m

$857

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 3/15

8:25 pm-11:59 pm

2 stops31h 34m

Portland

Sun 3/22

5:23 am-7:00 am

2 stops45h 37m

$876

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 3/15

10:45 am-11:22 pm

1 stop16h 37m

Portland

Sun 3/22

5:23 am-7:00 am

2 stops45h 37m

$879

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

7:40 am-9:11 pm

1 stop17h 31m

Portland

Sat 3/21

7:08 pm-10:25 am

1 stop11h 17m

$888

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 3/15

8:15 am-10:49 am

3 stops30h 34m

Portland

Sun 3/22

7:09 pm-5:30 pm

2 stops18h 21m

$1,228

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

8:15 am-10:51 pm

2 stops18h 36m

Portland

Sat 3/21

7:08 pm-9:35 pm

3 stops22h 27m

$1,332

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 Portland from

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

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 month to fly to Portland, Maine?

The cheapest month to fly to Portland, Maine from London Heathrow Airport is in February. Flight prices, which tend to average around $709, are often lower during this time because this is during the off-season. If you aren’t able to travel to Portland, Maine during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $739.

When to book flights from London Heathrow Airport to Portland, Maine

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Portland, Maine according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Heathrow Airport to Portland, Maine (LHR to PWM) flight deals and tips

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

Fastest flight time

16h 15m

Direct flights

None
The fastest flight from London Heathrow Airport to Portland, Maine takes 16h 15m
There are no direct flights from London Heathrow Airport to Portland, Maine. There are no popular flight routes from London Heathrow Airport to Portland, Maine.
Search flight deals

  • How far is London Heathrow to Portland by plane?

    A flight from London Heathrow to Portland will travel around 3170.3 mi. A reasonable flight in good conditions will take 16h 15m.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Portland Airport.

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

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Boothbay Harbor
Jackson
Conway
Freeport
Lewiston
Brunswick
Bartlett
Gorham
Auburn
Windham
Intervale
Bath
Oxford
Georgetown
Falmouth
Tamworth

Why use momondo?

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

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 London to Portland for you.

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

Yes. momondo allows you to filter the results for London to Portland flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Portland.

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

Of course. momondo tracks the price of London to Portland flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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