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$759+ Cheap flights from the United Kingdom to Portland, ME (PWM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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.
Tue 12/1610:25 amLHR - PWM
1 stop15h 52mUnited Airlines
Wed 12/312:14 pmPWM - LHR
2 stops15h 11mUnited Airlines
Deal found 12/10$1,859

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$759
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$735
Provider with most accurate pricing for London (LON)-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Boston Logan Intl flights.
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From United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
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

Tue 3/10

7:30 am-7:13 pm

2 stops15h 43m

Portland

Thu 3/19

6:00 am-7:10 am

2 stops21h 10m

$759

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 1/22

12:05 pm-11:30 pm

2 stops16h 25m

Portland

Mon 1/26

2:31 pm-9:10 am

2 stops13h 39m

$789

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 1/25

6:30 am-6:50 pm

2 stops17h 20m

Portland

Sun 2/1

4:10 pm-5:55 am

1 stop32h 45m

$807

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 3/10

4:25 pm-10:23 am

1 stop21h 58m

Portland

Thu 3/19

10:53 am-10:00 am

1 stop19h 07m

$811

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 1/8

12:00 pm-6:50 pm

1 stop11h 50m

Portland

Thu 1/15

9:40 am-6:40 am

1 stop16h 00m

$827

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Sat 1/24

6:05 am-6:54 pm

2 stops17h 49m

Portland

Sat 1/31

4:10 pm-5:00 pm

2 stops43h 50m

$984

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Sat 1/24

1:30 pm-10:27 pm

1 stop13h 57m

Portland

Sat 1/31

5:30 am-10:10 am

2 stops23h 40m

$996

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Sun 3/1

6:00 am-9:14 pm

2 stops20h 14m

Portland

Wed 3/4

4:11 pm-10:20 am

2 stops37h 09m

$2,116

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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, June is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $146). Flying from United Kingdom to Portland, Maine in October is currently the most expensive (average of $427). 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 13h 57m. The distance from United Kingdom to Portland, Maine is about 3061 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, June is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $146). Flying from United Kingdom to Portland, Maine in October is currently the most expensive (average of $427). 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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