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$369+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$611
(JetBlue)

One-way from

$369
(JetBlue)

Popular in

June

Cheapest in

November

Average price

$753
Provider with most accurate pricing for Portland-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Portland-London (LON) flights.
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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. 18% potential increase in price ($202 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This JetBlue deal was found by Cheapflights users on 4/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:35 pmPWM - LHR
1 stop10h 55mJetBlue
Sun 5/48:15 amLHR - PWM
1 stop11h 10mJetBlue
Deal found 4/16$611
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/222:31 pmPWM - LHR
1 stop11h 24mUnited Airlines
Tue 4/298:45 amLHR - PWM
2 stops19h 42mUnited Airlines
Deal found 4/15$692
This Delta deal was found by Cheapflights users on 4/15. 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.
Tue 4/225:20 amPWM - LHR
1 stop27h 10mDelta
Sun 4/279:00 amLHR - PWM
2 stops20h 42mDelta
Deal found 4/15$758
This JetBlue deal was found by Cheapflights users on 4/17. 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.
Mon 6/23:35 pmPWM - EDI
1 stop12h 40mJetBlue
Fri 6/2011:30 amEDI - PWM
1 stop17h 07mJetBlue
Deal found 4/17$795
This Expedia deal was found by Cheapflights users on 4/17. 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.
Mon 8/116:00 amPWM - LHR
2 stops21h 35mAir Canada
Mon 9/222:05 pmLHR - PWM
2 stops28h 44mAir Canada
Deal found 4/17$820
This Expedia deal was found by Cheapflights users on 4/17. 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.
Sun 6/16:35 amPWM - LHR
2 stops28h 25mScandinavian Airlines
Sun 6/87:50 pmLHR - PWM
2 stops33h 56mScandinavian Airlines
Deal found 4/17$831
This Air Canada deal was found by Cheapflights users on 4/17. 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.
Mon 8/1110:51 amPWM - LHR
3 stops16h 44mMultiple Airlines
Mon 9/222:05 pmLHR - PWM
2 stops13h 56mMultiple Airlines
Deal found 4/17$843
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/261:06 pmPWM - EDI
2 stops15h 44mAmerican Airlines
Mon 12/19:50 amEDI - PWM
2 stops17h 38mAmerican Airlines
Deal found 4/16$911
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:35 amPWM - LGW
2 stops28h 40mTurkish Airlines
Sun 5/45:30 amLGW - PWM
2 stops22h 49mTurkish Airlines
Deal found 4/16$917
This oojo deal was found by Cheapflights users on 4/17. 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.
Tue 5/67:12 amPWM - MAN
2 stops24h 03mTurkish Airlines
Sat 5/105:20 pmMAN - PWM
2 stops34h 59mTurkish Airlines
Deal found 4/17$919
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 4/276:45 pmPWM - EDI
1 stop10h 50mUnited Airlines
Sun 5/49:00 amEDI - PWM
2 stops34h 44mUnited Airlines
Deal found 4/17$958
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:35 amPWM - LHR
2 stops29h 05mTurkish Airlines
Sun 5/46:30 amLHR - PWM
2 stops21h 49mTurkish Airlines
Deal found 4/16$973

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 April 17, 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 - LHR

PWMLHR

Portland

Tue 4/29

5:35 pm-9:30 am

1 stop10h 55m

London Heathrow

Sun 5/4

8:15 am-2:25 pm

1 stop11h 10m

$611

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 4/22

2:31 pm-6:55 am

1 stop11h 24m

London Heathrow

Tue 4/29

8:45 am-11:27 pm

2 stops19h 42m

$692

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 4/22

5:20 am-1:30 pm

1 stop27h 10m

London Heathrow

Sun 4/27

9:00 am-12:42 am

2 stops20h 42m

$758

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Mon 6/2

3:35 pm-9:15 am

1 stop12h 40m

Edinburgh Turnhouse

Fri 6/20

11:30 am-11:37 pm

1 stop17h 07m

$795

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/1

6:35 am-4:00 pm

2 stops28h 25m

London Heathrow

Sun 6/8

7:50 pm-12:46 am

2 stops33h 56m

$831

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 4/22

6:15 am-10:00 am

2 stops22h 45m

London Heathrow

Mon 4/28

8:30 am-11:27 pm

2 stops19h 57m

$866

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 4/29

6:35 am-4:15 pm

2 stops28h 40m

London Gatwick

Sun 5/4

5:30 am-11:19 pm

2 stops22h 49m

$917

PortlandManchester

PWM - MAN

PWMMAN

Portland

Tue 5/6

7:12 am-12:15 pm

2 stops24h 03m

Manchester

Sat 5/10

5:20 pm-11:19 pm

2 stops34h 59m

$919

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Sun 4/27

6:45 pm-10:35 am

1 stop10h 50m

Edinburgh Turnhouse

Sun 5/4

9:00 am-2:44 pm

2 stops34h 44m

$958

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 4/29

6:35 am-4:40 pm

2 stops29h 05m

London Heathrow

Sun 5/4

6:30 am-11:19 pm

2 stops21h 49m

$973

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 43 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 $1,110). 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 April 17, 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.

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 April 17, 2025.
Read through reviews of airlines operating flights from Portland to United Kingdom, such as Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $369. Users have also found prices from $560 and $673 on Lufthansa and Finnair, 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 $1,110). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$586Average$705FlexibilityNo cancel feeOn-time62%
DeltaCheapest$638Average$1,046FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$680Average$848FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$715Average$1,062FlexibilityNo cancel feeOn-time69%

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