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$295+ Cheap flights from Portland, ME (PWM) to the United Kingdom

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Portland to United Kingdom

Keep the following information in mind while searching for Portland to United Kingdom flight deals. Data was last updated July 30, 2025.

Round-trip from

$596
(Kiwi.com)

One-way from

$295
(Netflights)

Popular in

July

Cheapest in

October

Average price

$1,188
From Portland to United Kingdom
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One-way flight from Portland to United Kingdom
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Highest demand for flights based on searches. 19% potential increase in price ($211 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Portland to United Kingdom

Cheapest flights from Portland to United Kingdom
Explore the most affordable flight options available from Portland to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:46 amPWM - LGW
1 stop19h 14mMultiple Airlines
Sun 9/142:00 pmLGW - PWM
1 stop24h 06mMultiple Airlines
Deal found 7/30$596
This Netflights deal was found by Cheapflights users on 7/29. 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.
Fri 9/122:17 pmPWM - LHR
1 stop14h 13mJetBlue
Fri 9/198:15 amLHR - PWM
1 stop18h 52mJetBlue
Deal found 7/29$632
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/136:10 amPWM - EDI
1 stop21h 15mUnited Airlines
Tue 8/2611:15 amEDI - PWM
2 stops36h 11mUnited Airlines
Deal found 7/27$645
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 8/134:10 pmPWM - EDI
1 stop10h 00mAmerican Airlines
Tue 8/2611:35 amEDI - PWM
1 stop14h 01mAmerican Airlines
Deal found 7/28$667
This Scandinavian Airlines deal was found by Cheapflights users on 7/29. 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.
Fri 9/126:33 amPWM - LHR
2 stops22h 02mScandinavian Airlines
Fri 9/196:40 amLHR - PWM
2 stops22h 54mScandinavian Airlines
Deal found 7/29$680
This Air Canada deal was found by Cheapflights users on 7/28. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:28 amPWM - EDI
3 stops18h 52mAir Canada
Tue 8/269:00 amEDI - PWM
3 stops19h 03mAir Canada
Deal found 7/28$681
This JetBlue deal was found by Cheapflights users on 7/28. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/112:17 pmPWM - EDI
1 stop13h 58mJetBlue
Thu 9/1811:30 amEDI - PWM
1 stop15h 37mJetBlue
Deal found 7/28$693
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 11/113:53 pmPWM - GLA
2 stops17h 42mAmerican Airlines
Thu 11/209:55 amGLA - PWM
2 stops17h 52mAmerican Airlines
Deal found 7/30$694
This KLM deal was found by Cheapflights users on 7/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1612:30 pmPWM - EDI
1 stop18h 35mKLM
Tue 9/232:05 pmEDI - PWM
1 stop15h 29mKLM
Deal found 7/30$721
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/2610:05 amPWM - LHR
1 stop15h 50mUnited Airlines
Tue 9/22:05 pmLHR - PWM
2 stops29h 21mUnited Airlines
Deal found 7/29$726
This Gotogate deal was found by Cheapflights users on 7/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:00 amPWM - LHR
2 stops19h 35mAir Canada
Wed 9/39:30 amLHR - PWM
2 stops13h 56mAir Canada
Deal found 7/29$740
This Expedia deal was found by Cheapflights users on 7/28. 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.
Wed 9/172:17 pmPWM - LGW
2 stops14h 18mJetBlue
Sun 9/2112:10 pmLGW - PWM
2 stops14h 57mJetBlue
Deal found 7/28$783

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to United Kingdom 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 July 30, 2025.
Use the filters below to find and compare flights from Portland to the United Kingdom that are best for you.

Fly from

Portland

Fly to

United Kingdom

Route

Depart

Return

Price

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 9/8

9:46 am-10:00 am

1 stop19h 14m

London Gatwick

Sun 9/14

2:00 pm-9:06 am

1 stop24h 06m

$596

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 9/12

2:17 pm-9:30 am

1 stop14h 13m

London Heathrow

Fri 9/19

8:15 am-10:07 pm

1 stop18h 52m

$632

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 8/13

6:10 am-8:25 am

1 stop21h 15m

Edinburgh Turnhouse

Tue 8/26

11:15 am-6:26 pm

2 stops36h 11m

$645

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 8/13

4:10 pm-7:10 am

1 stop10h 00m

Edinburgh Turnhouse

Tue 8/26

11:35 am-8:36 pm

1 stop14h 01m

$667

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 9/12

6:33 am-9:35 am

2 stops22h 02m

London Heathrow

Fri 9/19

6:40 am-12:34 am

2 stops22h 54m

$680

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 8/13

7:28 am-7:20 am

3 stops18h 52m

Edinburgh Turnhouse

Tue 8/26

9:00 am-11:03 pm

3 stops19h 03m

$681

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Thu 9/11

2:17 pm-9:15 am

1 stop13h 58m

Edinburgh Turnhouse

Thu 9/18

11:30 am-10:07 pm

1 stop15h 37m

$693

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Tue 11/11

3:53 pm-2:35 pm

2 stops17h 42m

Glasgow Intl

Thu 11/20

9:55 am-10:47 pm

2 stops17h 52m

$694

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 9/16

12:30 pm-12:05 pm

1 stop18h 35m

Edinburgh Turnhouse

Tue 9/23

2:05 pm-12:34 am

1 stop15h 29m

$721

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 8/26

10:05 am-6:55 am

1 stop15h 50m

London Heathrow

Tue 9/2

2:05 pm-2:26 pm

2 stops29h 21m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 45 results
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Best time to book a flight from Portland to United Kingdom

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

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

Currently, November is the cheapest month in which you can book a flight from Portland, Maine to United Kingdom (average of $661). Flying from Portland, Maine to United Kingdom in June is currently the most expensive (average of $1,097). 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.

What is the cheapest time of day to fly from PWM to GB?

Find hourly flight availability from Portland to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland, Maine to United Kingdom as you normally would.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Portland to the United Kingdom, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,928 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Portland to United Kingdom. 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 from for flights from Portland to United Kingdom?

    For a flight from Portland to United Kingdom, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

  • What are the cheapest airlines to fly from Portland, Maine to United Kingdom one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $295. Users have also found prices from $438 and $468 on Scandinavian Airlines and Air Canada, respectively.

  • What are the most popular routes from Portland, Maine to United Kingdom?

    Most travelers choose Portland - London Heathrow, Portland - London Gatwick or Portland - Edinburgh Turnhouse when deciding on the best route from Portland, Maine to United Kingdom.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Portland, Maine to United Kingdom (average of $661). Flying from Portland, Maine to United Kingdom in June is currently the most expensive (average of $1,097). 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

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Alternative routes for Portland to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Portland to United Kingdom

Discover the top 4 airlines that operate flights from Portland to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$586Average$712FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$648Average$949FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$679Average$846FlexibilityNo cancel feeOn-time71%
DeltaCheapest$686Average$917FlexibilityNo cancel feeOn-timeN/A

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