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$523+ Cheap flights from the United Kingdom to Portland, ME (PWM)

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from United Kingdom to Portland

Cheapest flights from United Kingdom to Portland
Explore the most affordable flight options available from United Kingdom to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1511:55 am
LHR
-
PWM
1 stop30h 28m
JetBlue
Sun 5/172:18 pm
PWM
-
LHR
1 stop25h 27m
JetBlue
Deal found 1/27$668
This American Airlines deal was found by Cheapflights users on 1/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:20 am
LHR
-
PWM
2 stops17h 23m
American Airlines
Mon 2/93:58 pm
PWM
-
LHR
2 stops35h 32m
American Airlines
Deal found 1/25$685
This Delta deal was found by Cheapflights users on 1/26. 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.
Mon 10/511:45 am
LHR
-
PWM
2 stops17h 14m
Delta
Mon 10/126:45 pm
PWM
-
LHR
1 stop13h 30m
Delta
Deal found 1/26$750
This Expedia deal was found by Cheapflights users on 1/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/510:45 am
LHR
-
PWM
1 stop16h 42m
KLM
Mon 2/92:35 pm
PWM
-
LHR
1 stop14h 40m
KLM
Deal found 1/25$768
This Delta deal was found by Cheapflights users on 1/25. 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.
Fri 2/611:45 am
LHR
-
PWM
2 stops17h 35m
Delta
Mon 2/92:35 pm
PWM
-
LHR
2 stops12h 15m
Delta
Deal found 1/25$775
This Delta deal was found by Cheapflights users on 1/27. 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.
Fri 5/1511:45 am
LHR
-
PWM
2 stops17h 14m
Delta
Sun 5/172:35 pm
PWM
-
LHR
1 stop19h 00m
Delta
Deal found 1/27$791
This Air France deal was found by Cheapflights users on 1/25. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/610:45 am
LHR
-
PWM
1 stop16h 42m
Multiple Airlines
Mon 2/92:35 pm
PWM
-
LHR
1 stop12h 30m
Multiple Airlines
Deal found 1/25$792
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/146:50 am
LHR
-
PWM
2 stops15h 35m
United Airlines
Sat 3/212:32 pm
PWM
-
LHR
1 stop16h 18m
United Airlines
Deal found 1/27$857
This Scandinavian Airlines deal was found by Cheapflights users on 1/26. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/126:40 am
LHR
-
PWM
2 stops21h 19m
Scandinavian Airlines
Thu 3/192:30 pm
PWM
-
LHR
3 stops24h 20m
Scandinavian Airlines
Deal found 1/26$858
This United Airlines deal was found by Cheapflights users on 1/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/512:05 pm
LHR
-
PWM
2 stops16h 25m
United Airlines
Mon 2/93:12 pm
PWM
-
LHR
2 stops14h 38m
United Airlines
Deal found 1/25$864
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/131:25 pm
MAN
-
PWM
1 stop13h 57m
Virgin Atlantic
Fri 3/205:23 am
PWM
-
MAN
2 stops22h 32m
Virgin Atlantic
Deal found 1/27$913
This Delta deal was found by Cheapflights users on 1/27. 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.
Fri 3/131:25 pm
MAN
-
PWM
1 stop13h 57m
Delta
Fri 3/202:30 pm
PWM
-
MAN
2 stops21h 35m
Delta
Deal found 1/27$937

Find flight deals from United Kingdom to Portland

Keep the following information in mind while searching for United Kingdom to Portland flight deals. Data was last updated January 28, 2026.

Round-trip from

$668
(TravelUp)

One-way from

$523
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$765
From United Kingdom to Portland
Search Deals
One-way flight from United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom to Portland 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 January 28, 2026.
Use the filters below to find and compare flights from the United Kingdom to Portland that are best for you.

Fly from

United Kingdom

Fly to

Portland

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

Thu 3/12

10:45 am-11:22 pm

1 stop16h 37m

Portland

Thu 3/19

2:30 pm-10:15 am

1 stop15h 45m

$768

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 3/12

8:40 am-11:59 pm

2 stops19h 19m

Portland

Thu 3/19

4:48 pm-10:15 am

2 stops13h 27m

$775

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

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

Thu 3/12

6:40 am-11:59 pm

2 stops21h 19m

Portland

Thu 3/19

2:30 pm-6:50 pm

3 stops24h 20m

$858

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Fri 3/13

1:25 pm-11:22 pm

1 stop13h 57m

Portland

Fri 3/20

5:23 am-7:55 am

2 stops22h 32m

$913

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Fri 3/13

1:25 pm-11:22 pm

1 stop13h 57m

Portland

Fri 3/20

2:30 pm-4:05 pm

2 stops21h 35m

$937

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Thu 5/7

5:55 am-10:18 am

2 stops33h 23m

Portland

Mon 5/11

3:39 pm-10:25 am

2 stops13h 46m

$984

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 21 results
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Best time to book a flight from United Kingdom to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from United Kingdom 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 the United Kingdom to Portland

What is the cheapest month to book a flight from United Kingdom to Portland, Maine?

Currently, July is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $187). Flying from United Kingdom to Portland, Maine in December is currently the most expensive (average of $496). 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.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Portland from United Kingdom?

    If you book a flight to Portland from United Kingdom, you will be flying to Portland, which is the city’s only airport. Portland (PWM) is located 2.9 mi from the center of Portland.

  • How long is the flight from United Kingdom to Portland, Maine?

    Departing from United Kingdom to Portland, Maine will take you 16h 37m. The distance from United Kingdom to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from United Kingdom to Portland that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Portland?

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

  • Can I find deals for business class flights from United Kingdom to Portland?

    Yes. Cheapflights offers flight deals from United Kingdom to Portland 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 United Kingdom to Portland, Maine?

    Currently, July is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $187). Flying from United Kingdom to Portland, Maine in December is currently the most expensive (average of $496). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Brunswick
Auburn
Conway

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