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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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$712
(JetBlue)

One-way from

$295
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$751
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
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This JetBlue Airways deal was found by Cheapflights users on 3/30. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:15 pmPWM - LHR
1 stop14h 15mJetBlue
Tue 10/711:55 amLHR - PWM
1 stop15h 04mJetBlue
Deal found 3/30$608
This JetBlue deal was found by Cheapflights users on 3/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:15 pmPWM - EDI
1 stop14h 00mJetBlue
Wed 10/1511:30 amEDI - PWM
1 stop15h 29mJetBlue
Deal found 3/30$706
This KAYAK deal was found by Cheapflights users on 3/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:35 pmPWM - LHR
2 stops37h 45mScandinavian Airlines
Tue 10/75:30 pmLHR - PWM
2 stops35h 15mScandinavian Airlines
Deal found 3/30$706
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/294:10 pmPWM - GLA
2 stops19h 35mAmerican Airlines
Tue 5/65:50 amGLA - PWM
2 stops21h 55mAmerican Airlines
Deal found 3/30$726
This Air Canada deal was found by Cheapflights users on 3/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/286:00 amPWM - EDI
2 stops20h 20mAir Canada
Tue 10/149:00 amEDI - PWM
2 stops33h 49mAir Canada
Deal found 3/30$735
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/289:34 amPWM - EDI
1 stop20h 01mUnited Airlines
Wed 10/1512:30 pmEDI - PWM
1 stop16h 26mUnited Airlines
Deal found 3/30$746
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/46:55 pmPWM - EDI
1 stop32h 05mDelta
Tue 10/1411:20 amEDI - PWM
2 stops17h 11mDelta
Deal found 3/30$756
This United deal was found by Cheapflights users on 3/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:00 amPWM - LHR
1 stop9h 35mUnited Airlines
Tue 11/182:30 pmLHR - PWM
2 stops35h 57mUnited Airlines
Deal found 3/31$759
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:00 amPWM - LHR
2 stops19h 30mAir Canada
Tue 11/189:00 amLHR - PWM
2 stops43h 17mAir Canada
Deal found 3/30$766
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:35 pmPWM - LHR
1 stop10h 50mDelta
Tue 10/76:30 amLHR - PWM
2 stops16h 20mDelta
Deal found 3/30$768
This Finnair deal was found by Cheapflights users on 3/31. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/101:06 pmPWM - LHR
1 stop13h 44mMultiple Airlines
Tue 11/181:10 pmLHR - PWM
1 stop14h 18mMultiple Airlines
Deal found 3/31$772
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/142:30 pmPWM - MAN
1 stop12h 15mDelta
Wed 5/212:15 pmMAN - PWM
1 stop14h 59mDelta
Deal found 3/30$799

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 March 31, 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

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 5/14

3:35 pm-9:15 am

1 stop12h 40m

Edinburgh Turnhouse

Wed 5/21

11:30 am-11:00 pm

1 stop16h 30m

$712

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Tue 4/29

4:10 pm-4:45 pm

2 stops19h 35m

Glasgow Intl

Tue 5/6

5:50 am-10:45 pm

2 stops21h 55m

$726

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/14

3:35 pm-9:30 am

1 stop12h 55m

London Heathrow

Wed 5/21

8:15 am-2:40 pm

1 stop11h 25m

$738

PortlandManchester

PWM - MAN

PWMMAN

Portland

Wed 5/14

2:30 pm-7:45 am

1 stop12h 15m

Manchester

Wed 5/21

2:15 pm-12:14 am

1 stop14h 59m

$799

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/14

12:37 pm-6:30 am

2 stops12h 53m

London Heathrow

Wed 5/21

10:50 am-11:59 pm

2 stops18h 09m

$813

PortlandManchester

PWM - MAN

PWMMAN

Portland

Wed 5/14

4:01 pm-1:10 pm

2 stops16h 09m

Manchester

Wed 5/21

7:05 am-10:45 pm

2 stops20h 40m

$819

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Wed 5/14

2:30 pm-1:00 pm

2 stops17h 30m

Glasgow Intl

Wed 5/21

8:55 am-12:14 am

2 stops20h 19m

$825

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/14

6:00 am-6:30 am

3 stops19h 30m

London Heathrow

Wed 5/21

2:05 pm-11:59 pm

2 stops14h 54m

$835

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 5/14

6:13 am-10:35 am

2 stops23h 22m

Edinburgh Turnhouse

Wed 5/21

9:40 am-7:11 pm

2 stops14h 31m

$835

PortlandManchester

PWM - MAN

PWMMAN

Portland

Thu 5/15

6:55 pm-5:25 pm

2 stops17h 30m

Manchester

Thu 5/22

10:40 am-11:57 pm

2 stops18h 17m

$904

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 42 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 March 31, 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 March 31, 2025.
Read through reviews of airlines operating flights from Portland to United Kingdom, such as Delta, KLM and Austrian Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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
770 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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.
Virgin Atlantic
7.4
Good
636 reviews
Delta
8.0
Very good
7,899 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

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 TAP AIR PORTUGAL. According to our data, you can fly for as low as $507. Users have also found prices from $532 and $539 on JetBlue and Virgin Atlantic, 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 3 airlines flying from Portland to United Kingdom

Discover the top 3 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$586Average$705FlexibilityNo cancel feeOn-time62%
DeltaCheapest$638Average$1,026FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$715Average$1,063FlexibilityNo cancel feeOn-time69%
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