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$589+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
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Cheap 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 August 17, 2025.

Round-trip from

$589
(TravelUp)

Popular in

August

Cheapest in

February

Average price

$1,116
From United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find 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 August 17, 2025.

This TravelUp deal was found by Cheapflights users on 8/16. 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 9/128:15 amLHR - PWM
1 stop18h 52mJetBlue
Wed 9/172:17 pmPWM - LHR
1 stop25h 28mJetBlue
Deal found 8/16$589
This Trip.com deal was found by Cheapflights users on 8/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/298:15 amLHR - PWM
1 stop18h 52mJetBlue
Mon 10/67:09 amPWM - LHR
1 stop21h 21mJetBlue
Deal found 8/15$618
This The Travel House deal was found by Cheapflights users on 8/15. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:25 amLHR - PWM
2 stops33h 57mIcelandair
Fri 9/192:17 pmPWM - LHR
1 stop25h 28mIcelandair
Deal found 8/15$663
This TravelUp deal was found by Cheapflights users on 8/15. 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.
Mon 9/2912:45 pmLHR - PWM
2 stops16h 26mVirgin Atlantic
Mon 10/66:00 amPWM - LHR
1 stop20h 15mVirgin Atlantic
Deal found 8/15$674
This Delta deal was found by Cheapflights users on 8/15. 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 9/299:55 amLHR - PWM
2 stops19h 39mDelta
Mon 10/62:38 pmPWM - LHR
1 stop10h 47mDelta
Deal found 8/15$691
This TravelUp deal was found by Cheapflights users on 8/16. 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 9/1212:45 pmLHR - PWM
2 stops16h 26mVirgin Atlantic
Wed 9/176:00 amPWM - LHR
1 stop26h 30mVirgin Atlantic
Deal found 8/16$710
This The Travel House deal was found by Cheapflights users on 8/16. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3011:55 amLHR - PWM
1 stop30h 27mIcelandair
Thu 10/22:17 pmPWM - LHR
1 stop25h 28mIcelandair
Deal found 8/16$711
This oojo deal was found by Cheapflights users on 8/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:05 amLHR - PWM
2 stops22h 29mScandinavian Airlines
Fri 9/196:33 amPWM - LHR
2 stops27h 02mScandinavian Airlines
Deal found 8/15$742
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/307:30 amLHR - PWM
2 stops14h 14mUnited Airlines
Tue 10/73:45 pmPWM - LHR
2 stops13h 55mUnited Airlines
Deal found 8/16$761
This Trip.com deal was found by Cheapflights users on 8/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1211:55 amLHR - PWM
1 stop15h 12mJetBlue
Fri 9/192:17 pmPWM - LHR
1 stop14h 13mJetBlue
Deal found 8/15$775
This Netflights deal was found by Cheapflights users on 8/16. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:00 pmMAN - PWM
2 stops16h 11mVirgin Atlantic
Mon 10/61:27 pmPWM - MAN
1 stop14h 08mVirgin Atlantic
Deal found 8/16$840
This Delta deal was found by Cheapflights users on 8/15. 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.
Thu 10/22:15 pmMAN - PWM
1 stop15h 19mDelta
Mon 10/62:38 pmPWM - MAN
2 stops17h 47mDelta
Deal found 8/15$862

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 August 17, 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

Fri 9/12

8:15 am-10:07 pm

1 stop18h 52m

Portland

Wed 9/17

2:17 pm-8:45 pm

1 stop25h 28m

$589

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/29

8:15 am-10:07 pm

1 stop18h 52m

Portland

Mon 10/6

7:09 am-9:30 am

1 stop21h 21m

$618

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 9/12

8:25 am-1:22 pm

2 stops33h 57m

Portland

Fri 9/19

2:17 pm-8:45 pm

1 stop25h 28m

$663

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/29

12:45 pm-12:11 am

2 stops16h 26m

Portland

Mon 10/6

6:00 am-7:15 am

1 stop20h 15m

$674

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/29

9:55 am-12:34 am

2 stops19h 39m

Portland

Mon 10/6

2:38 pm-6:25 am

1 stop10h 47m

$691

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 9/12

12:45 pm-12:11 am

2 stops16h 26m

Portland

Wed 9/17

6:00 am-1:30 pm

1 stop26h 30m

$710

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/30

8:25 am-1:22 pm

2 stops33h 57m

Portland

Thu 10/2

2:17 pm-6:30 am

2 stops35h 13m

$711

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 9/12

7:05 am-12:34 am

2 stops22h 29m

Portland

Fri 9/19

6:33 am-2:35 pm

2 stops27h 02m

$742

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Thu 10/2

1:00 pm-12:11 am

2 stops16h 11m

Portland

Mon 10/6

1:27 pm-8:35 am

1 stop14h 08m

$840

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Thu 10/2

2:15 pm-12:34 am

1 stop15h 19m

Portland

Mon 10/6

2:38 pm-1:25 pm

2 stops17h 47m

$862

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 19 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, January is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $296). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of $394). 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.

  • 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, January is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of $296). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of $394). 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
Brunswick
North Conway
Auburn
Conway
Lewiston

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