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Cheap flights from the United Kingdom to Portland from $487

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Portland departing on 6/3. 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 the United Kingdom to Portland

Recent round-trip flight deals from the United Kingdom to Portland

Enter your travel dates to find the best prices.
JetBlue Logo
11:55 am - 11:36 pm
LHR
-
PWM
16h 41m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$760JetBlue
Thu, May 7 - Thu, May 14
JetBlue Logo
11:55 am - 11:36 pm
LHR
-
PWM
16h 41m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$789JetBlue
Wed, May 6 - Sat, May 9
JetBlue Logo
11:55 am - 11:36 pm
LHR
-
PWM
16h 41m
1 stop
JetBlue Logo
6:00 am - 8:45 pm
PWM
-
LHR
9h 45m
1 stop
$790JetBlue
Wed, May 6 - Sat, May 9
United Airlines Logo
6:35 am - 7:13 pm
LHR
-
PWM
17h 38m
2 stops
United Airlines Logo
11:34 am - 6:55 am
PWM
-
LHR
14h 21m
2 stops
$814United Airlines
Fri, Mar 6 - Wed, May 6
United Airlines Logo
8:40 am - 10:18 am
LHR
-
PWM
30h 38m
2 stops
United Airlines Logo
6:00 am - 9:35 pm
PWM
-
LHR
10h 35m
1 stop
$822United Airlines
Thu, May 7 - Thu, May 14
Austrian Airlines Logo
9:10 am - 6:25 pm
LHR
-
PWM
14h 15m
1 stop
Austrian Airlines Logo
11:08 am - 5:55 am
PWM
-
LHR
13h 47m
1 stop
$830Austrian Airlines
Fri, Mar 6 - Wed, May 6
Austrian Airlines Logo
4:00 pm - 6:25 pm
LHR
-
PWM
30h 25m
1 stop
Austrian Airlines Logo
11:08 am - 9:20 am
PWM
-
LHR
17h 12m
1 stop
$832Austrian Airlines
Sat, Mar 14 - Thu, May 14
Multiple Airlines Logo
9:10 am - 6:25 pm
LHR
-
PWM
13h 15m
1 stop
Multiple Airlines Logo
11:08 am - 6:30 am
PWM
-
LHR
14h 22m
2 stops
$841Multiple Airlines
Sat, Mar 14 - Wed, May 6
United Airlines Logo
9:10 am - 9:11 pm
LHR
-
PWM
16h 01m
2 stops
United Airlines Logo
6:00 am - 9:35 pm
PWM
-
LHR
10h 35m
1 stop
$848United Airlines
Sat, Mar 14 - Thu, May 14
United Airlines Logo
11:10 am - 10:18 pm
LHR
-
PWM
16h 08m
2 stops
United Airlines Logo
6:00 am - 8:35 pm
PWM
-
LHR
10h 35m
1 stop
$855United Airlines
Fri, Mar 6 - Fri, Mar 13

United Airlines flights from United Kingdom to Portland, Maine

Our best United Airlines deals on United Kingdom to Portland, Maine flight tickets
United Airlines
Mar 6
LHR6:35 amLondon Heathrow
17h 38m
2 stops
PWM7:13 pmPortland
May 6
PWM11:34 amPortland
14h 21m
2 stops
LHR6:55 amLondon Heathrow
$814
United Airlines
May 7
LHR8:40 amLondon Heathrow
30h 38m
2 stops
PWM10:18 amPortland
May 14
PWM6:00 amPortland
10h 35m
1 stop
LHR9:35 pmLondon Heathrow
$822
United Airlines
Mar 14
LHR9:10 amLondon Heathrow
16h 01m
2 stops
PWM9:11 pmPortland
May 14
PWM6:00 amPortland
10h 35m
1 stop
LHR9:35 pmLondon Heathrow
$848

Delta flights from United Kingdom to Portland, Maine

Our best Delta deals on United Kingdom to Portland, Maine flight tickets
Delta
Jul 26
LHR3:50 pmLondon Heathrow
13h 09m
1 stop
PWM11:59 pmPortland
Aug 9
PWM2:35 pmPortland
10h 45m
1 stop
LHR6:20 amLondon Heathrow
$2,412
Delta
Feb 15
LHR12:40 pmLondon Heathrow
16h 38m
1 stop
PWM12:18 amPortland
Mar 4
PWM12:13 pmPortland
14h 52m
2 stops
LHR8:05 amLondon Heathrow
$10,758

momondo Fare Finder

 
Customize your flight search to find flights from United Kingdom 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 February 10, 2026.
Use the filters below to find and compare flights from the United Kingdom to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/7

11:55 am-11:36 pm

1 stop16h 41m

Portland

Thu 5/14

6:00 am-8:45 pm

1 stop9h 45m

$760

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 5/6

11:55 am-11:36 pm

1 stop16h 41m

Portland

Sat 5/9

6:00 am-8:45 pm

1 stop9h 45m

$789

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 5/6

11:55 am-11:36 pm

1 stop16h 41m

Portland

Sat 5/9

6:00 am-8:45 pm

1 stop9h 45m

$790

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 3/6

6:35 am-7:13 pm

2 stops17h 38m

Portland

Wed 5/6

11:34 am-6:55 am

2 stops14h 21m

$814

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/7

8:40 am-10:18 am

2 stops30h 38m

Portland

Thu 5/14

6:00 am-9:35 pm

1 stop10h 35m

$822

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 3/6

9:10 am-6:25 pm

1 stop14h 15m

Portland

Wed 5/6

11:08 am-5:55 am

1 stop13h 47m

$830

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

4:00 pm-6:25 pm

1 stop30h 25m

Portland

Thu 5/14

11:08 am-9:20 am

1 stop17h 12m

$832

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

9:10 am-6:25 pm

1 stop13h 15m

Portland

Wed 5/6

11:08 am-6:30 am

2 stops14h 22m

$841

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/14

9:10 am-9:11 pm

2 stops16h 01m

Portland

Thu 5/14

6:00 am-9:35 pm

1 stop10h 35m

$848

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 3/6

11:10 am-10:18 pm

2 stops16h 08m

Portland

Fri 3/13

6:00 am-8:35 pm

1 stop10h 35m

$855

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 United Kingdom 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 United Kingdom is in October. Flight prices, which tend to average around $694, 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 February is also cheap. Prices for this month can be found on momondo for an average of $731.

Cheap United Kingdom to Portland, Maine flight deals and tips

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

Fastest flight time

16h 41m

Direct flights

None
The fastest flight from United Kingdom to Portland, Maine takes 16h 41m
There are no direct flights from United Kingdom to Portland, Maine. There are no popular flight routes from United Kingdom to Portland, Maine.
Search flight deals

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

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

  • How old do you have to be to fly from United Kingdom to Portland Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United Kingdom 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
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 United Kingdom to Portland?

Finding the right flight to Portland from United Kingdom is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portland quick and easy, saving you time and money.

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

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

How can momondo help me find flights from United Kingdom 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 United Kingdom to Portland.

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

If you are simply researching potential flights to Portland, momondo offers a useful price alert feature which will track prices for flights to Portland from United Kingdom and alert you when they change.

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