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Cheap flights from London to Portland from $602

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 to Portland departing on 8/10. 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
1 adult, Economy, 0 bags

Find the cheapest flights from London to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
8:15 am - 11:52 pm
LHR
-
PWM
20h 37m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$709JetBlue
Mon, Sep 21 - Mon, Sep 28
JetBlue Logo
11:55 am - 1:45 pm
LHR
-
PWM
30h 50m
1 stop
JetBlue Logo
1:25 pm - 9:30 am
PWM
-
LHR
15h 05m
1 stop
$767JetBlue
Tue, Jul 7 - Tue, Jul 14
JetBlue Logo
8:15 am - 12:16 am
LHR
-
PWM
21h 01m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$768JetBlue
Wed, Jul 8 - Mon, Jul 13
JetBlue Logo
11:55 am - 12:16 am
LHR
-
PWM
17h 21m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$777JetBlue
Wed, Jul 8 - Mon, Jul 13
JetBlue Logo
8:15 am - 12:25 am
LHR
-
PWM
21h 10m
1 stop
JetBlue Logo
2:40 pm - 8:45 pm
PWM
-
LHR
25h 05m
1 stop
$787JetBlue
Fri, Jul 3 - Fri, Jul 10
JetBlue Logo
8:15 am - 12:21 pm
LHR
-
PWM
33h 06m
1 stop
JetBlue Logo
2:40 pm - 8:45 pm
PWM
-
LHR
25h 05m
1 stop
$802JetBlue
Sat, Aug 29 - Wed, Sep 2
JetBlue Logo
8:15 am - 12:25 am
LHR
-
PWM
21h 10m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$814JetBlue
Sat, Jul 4 - Fri, Jul 10
JetBlue Logo
8:15 am - 12:30 pm
LHR
-
PWM
33h 15m
1 stop
JetBlue Logo
2:40 pm - 8:45 pm
PWM
-
LHR
25h 05m
1 stop
$857JetBlue
Mon, Jul 6 - Fri, Jul 24
JetBlue Logo
8:15 am - 12:30 pm
LHR
-
PWM
33h 15m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$862JetBlue
Mon, Jul 6 - Mon, Jul 13
United Airlines Logo
7:30 am - 6:29 pm
LHR
-
PWM
15h 59m
2 stops
United Airlines Logo
11:35 am - 6:45 am
PWM
-
LHR
14h 10m
1 stop
$893United Airlines
Mon, Sep 21 - Mon, Sep 28

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Scandinavian Airlines flights from London to Portland, Maine

Our best Scandinavian Airlines deals on London to Portland, Maine flight tickets
Scandinavian Airlines
Jul 4
LHR6:40 amLondon Heathrow
23h 12m
2 stops
PWM12:52 amPortland
Jul 10
PWM6:00 amPortland
22h 20m
3 stops
LHR9:20 amLondon Heathrow
$1,258
Scandinavian Airlines
Jul 3
LHR7:05 amLondon Heathrow
22h 47m
2 stops
PWM12:52 amPortland
Jul 10
PWM6:00 amPortland
22h 20m
3 stops
LHR9:20 amLondon Heathrow
$1,380
Scandinavian Airlines
Jul 4
LHR6:40 amLondon Heathrow
23h 12m
3 stops
PWM12:52 amPortland
Jul 10
PWM6:00 amPortland
22h 20m
3 stops
LHR9:20 amLondon Heathrow
$1,398

JetBlue flights from London to Portland, Maine

Our best JetBlue deals on London to Portland, Maine flight tickets
JetBlue
Sep 21
LHR8:15 amLondon Heathrow
20h 37m
1 stop
PWM11:52 pmPortland
Sep 28
PWM6:00 amPortland
9h 45m
1 stop
LHR8:45 pmLondon Heathrow
$709
JetBlue
Jul 7
LHR11:55 amLondon Heathrow
30h 50m
1 stop
PWM1:45 pmPortland
Jul 14
PWM1:25 pmPortland
15h 05m
1 stop
LHR9:30 amLondon Heathrow
$767
JetBlue
Jul 8
LHR8:15 amLondon Heathrow
21h 01m
1 stop
PWM12:16 amPortland
Jul 13
PWM6:00 amPortland
9h 45m
1 stop
LHR8:45 pmLondon Heathrow
$768

momondo Fare Finder

 
Customize your flight search to find flights from London 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 June 9, 2026.
Use the filters below to find and compare flights from London to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/21

8:15 am-11:52 pm

1 stop20h 37m

Portland

Mon 9/28

6:00 am-8:45 pm

1 stop9h 45m

$709

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 7/7

11:55 am-1:45 pm

1 stop30h 50m

Portland

Tue 7/14

1:25 pm-9:30 am

1 stop15h 05m

$767

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 7/8

8:15 am-12:16 am

1 stop21h 01m

Portland

Mon 7/13

6:00 am-8:45 pm

1 stop9h 45m

$768
Quickest round-trip

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 7/8

11:55 am-12:16 am

1 stop17h 21m

Portland

Mon 7/13

6:00 am-8:45 pm

1 stop9h 45m

$777

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 7/3

8:15 am-12:25 am

1 stop21h 10m

Portland

Fri 7/10

2:40 pm-8:45 pm

1 stop25h 05m

$787

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 8/29

8:15 am-12:21 pm

1 stop33h 06m

Portland

Wed 9/2

2:40 pm-8:45 pm

1 stop25h 05m

$802

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 7/4

8:15 am-12:25 am

1 stop21h 10m

Portland

Fri 7/10

6:00 am-8:45 pm

1 stop9h 45m

$814

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 7/6

8:15 am-12:30 pm

1 stop33h 15m

Portland

Fri 7/24

2:40 pm-8:45 pm

1 stop25h 05m

$857

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 7/6

8:15 am-12:30 pm

1 stop33h 15m

Portland

Mon 7/13

6:00 am-8:45 pm

1 stop9h 45m

$862

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/21

7:30 am-6:29 pm

2 stops15h 59m

Portland

Mon 9/28

11:35 am-6:45 am

1 stop14h 10m

$893

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 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 typical price of a round-trip flight between London and Portland, Maine?

What is the cheapest month to fly to Portland, Maine?

The cheapest month to fly to Portland, Maine from London is in October. Flight prices, which tend to average around $162, 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 October, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $193.

When to book flights from London to Portland, Maine

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

Cheap London to Portland, Maine (LON to PWM) flight deals and tips

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

Fastest flight time

17h 30m

Direct flights

None
The fastest flight from London to Portland, Maine takes 17h 30m
There are no direct flights from London to Portland, Maine. There are no popular flight routes from London to Portland, Maine.
Search flight deals

Frequently asked questions about flying from London to Portland, Maine

  • How far is London to Portland by plane?

    There are 3183.1 mi between London and Portland. By plane, this route typically takes 17h 30m.

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

    Prices for flights from London to Portland Airport were last updated today.

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

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

    The travel and health documents you'll need for your trip to Portland Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portland Airport. It is always advisable to seek advice from your airline or a trusted 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
Lewiston
Freeport
Conway
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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Portland. momondo saves you time and could save you money on your trip.

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?

Price alerts on flights to Portland from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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