What are the cheapest airlines flying from Portland, Maine to London round-trip?

Flying on JetBlue is currently your cheapest option to London, with prices starting at $623. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $702 and $715, respectively. JetBlue is 27% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Portland, Maine to London one-way?

To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $393. Air Canada flights start at $475 while deals on Delta start at $479 one-way.

What is the cheapest day to fly from Portland, Maine to London?

Travelers seeking maximum savings on their Portland, Maine to London flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Portland, Maine to London?

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

What are the most popular airlines that fly from Portland, Maine to London?

JetBlue, Delta and United Airlines are the most popular airlines when flying from Portland, Maine to London.

What is the cheapest day to fly round-trip from Portland, Maine to London?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 18% on the overall cost on flights from Portland, Maine to London.

What is the cheapest month to fly from Portland, Maine to London?

November is one of the best times of the year to fly to London from Portland, Maine. Prices for November average $864 per person but you can even find prices for as low as $696. The most expensive prices can be found in the month of June. Opting for a November flight can save you 43% on your journey compared to booking in June

Most accurate provider : When it comes to deals on Portland, Maine-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland, Maine-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Portland, Maine-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland, Maine-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Portland to London?

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

Can I find deals for flights from Portland to London that include hotel bookings?

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

How can I find direct flights from Portland to London?

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

Can I find deals for business class flights from Portland to London?

Yes. Cheapflights offers flight deals from Portland to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$286+ Flights from Portland, ME to London

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1. Tell us where you want to go

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Cheap flight deals from Portland to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$623 (JetBlue Airways)
One-way from	$286 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$753

Provider with most accurate pricing for Portland-London (LON) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-London (LON) flights.

Search Deals

From Portland to London (LON)

Search Deals

One-way flight from Portland to London (LON)

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($202 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Find flight deals from Portland to London

Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

Tue 4/295:35 pmPWM - LHR

1 stop10h 55mJetBlue

Sun 5/48:15 amLHR - PWM

1 stop11h 10mJetBlue

Deal found 4/13

$623

Mon 10/2012:30 pmPWM - LHR

1 stop17h 40mDelta

Fri 10/316:30 amLHR - PWM

2 stops21h 01mDelta

Deal found 4/12

$694

Mon 8/114:16 pmPWM - LHR

1 stop9h 24mMultiple Airlines

Thu 8/2112:15 pmLHR - PWM

1 stop14h 51mMultiple Airlines

Deal found 4/13

$699

Wed 5/142:30 pmPWM - LHR

1 stop13h 20mKLM

Wed 5/211:05 pmLHR - PWM

1 stop15h 54mKLM

Deal found 4/14

$715

Thu 11/64:00 pmPWM - LHR

1 stop12h 10mUnited Airlines

Tue 11/112:30 pmLHR - PWM

2 stops28h 22mUnited Airlines

Deal found 4/14

$734

Mon 8/118:00 amPWM - LHR

3 stops17h 35mAir Canada

Thu 8/218:30 amLHR - PWM

3 stops19h 31mAir Canada

Deal found 4/13

$751

Tue 4/296:35 amPWM - LGW

2 stops22h 20mTurkish Airlines

Sun 5/45:30 amLGW - PWM

2 stops22h 49mTurkish Airlines

Deal found 4/13

$915

Sat 5/242:30 pmPWM - LHR

2 stops22h 10mScandinavian Airlines

Sat 5/316:40 amLHR - PWM

2 stops22h 34mScandinavian Airlines

Deal found 4/13

$916

Mon 8/42:35 pmPWM - LGW

1 stop14h 25mDelta

Sun 8/1012:00 pmLGW - PWM

1 stop16h 45mDelta

Deal found 4/14

$1,094

Fri 7/182:35 pmPWM - LCY

2 stops13h 15mDelta

Wed 7/239:20 amLCY - PWM

2 stops19h 25mDelta

Deal found 4/13

$1,125

Sun 5/183:17 pmPWM - LGW

2 stops18h 23mMultiple Airlines

Sun 5/252:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/14

$1,197

Fri 6/272:20 pmPWM - LHR

2 stops27h 05mTurkish Airlines

Sun 7/1310:25 pmLHR - PWM

2 stops30h 12mTurkish Airlines

Deal found 4/14

$1,203

Best flights from Portland to London
Discover carefully curated flight deals from Portland to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Tue 4/295:35 pmPWM - LHR

1 stop10h 55mJetBlue

Sun 5/48:15 amLHR - PWM

1 stop11h 10mJetBlue

Deal found 4/13

$623

Mon 8/114:16 pmPWM - LHR

1 stop9h 24mMultiple Airlines

Thu 8/2112:15 pmLHR - PWM

1 stop14h 51mMultiple Airlines

Deal found 4/13

$699

Wed 5/142:30 pmPWM - LHR

1 stop14h 30mDelta

Wed 5/218:40 amLHR - PWM

2 stops20h 19mDelta

Deal found 4/14

$702

Wed 5/142:30 pmPWM - LHR

1 stop13h 20mKLM

Wed 5/211:05 pmLHR - PWM

1 stop15h 54mKLM

Deal found 4/14

$715

Sun 5/113:43 pmPWM - LHR

1 stop10h 32mUnited Airlines

Sun 5/181:45 pmLHR - PWM

2 stops14h 42mUnited Airlines

Deal found 4/12

$740

Mon 8/118:00 amPWM - LHR

3 stops17h 35mAir Canada

Thu 8/218:30 amLHR - PWM

3 stops19h 31mAir Canada

Deal found 4/13

$751

Tue 4/296:35 amPWM - LGW

2 stops22h 20mTurkish Airlines

Sun 5/45:30 amLGW - PWM

2 stops22h 49mTurkish Airlines

Deal found 4/13

$915

Sat 5/242:30 pmPWM - LHR

2 stops22h 10mScandinavian Airlines

Sat 5/316:40 amLHR - PWM

2 stops22h 34mScandinavian Airlines

Deal found 4/13

$916

Sat 8/210:51 amPWM - LHR

1 stop14h 54mAustrian Airlines

Fri 8/83:05 pmLHR - PWM

2 stops32h 08mAustrian Airlines

Deal found 4/14

$1,321

Mon 8/42:35 pmPWM - LGW

1 stop14h 25mDelta

Sun 8/1012:00 pmLGW - PWM

1 stop16h 45mDelta

Deal found 4/14

$1,094

Sun 5/183:17 pmPWM - LGW

2 stops18h 23mMultiple Airlines

Sun 5/252:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/14

$1,197

Fri 6/272:20 pmPWM - LHR

2 stops27h 05mTurkish Airlines

Sun 7/1310:25 pmLHR - PWM

2 stops30h 12mTurkish Airlines

Deal found 4/14

$1,203

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated April 15, 2025 and is based on user searches.

Tue 4/295:35 pmPWM - LHR

1 stop10h 55mJetBlue

Sun 5/48:15 amLHR - PWM

1 stop11h 10mJetBlue

Deal found 4/13

$623

Tue 4/296:15 amPWM - LHR

3 stops19h 15mAir Canada

Sun 5/48:30 amLHR - PWM

3 stops19h 57mAir Canada

Deal found 4/13

$770

Tue 4/296:35 amPWM - LGW

2 stops22h 20mTurkish Airlines

Sun 5/45:30 amLGW - PWM

2 stops22h 49mTurkish Airlines

Deal found 4/13

$915

Tue 4/292:59 pmPWM - LCY

2 stops13h 31mDelta

Sun 5/41:45 pmLCY - PWM

2 stops15h 57mDelta

Deal found 4/13

$2,223

Sun 5/116:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

Sun 5/187:30 pmLHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 4/12

$734

Sun 5/113:43 pmPWM - LHR

1 stop10h 32mUnited Airlines

Sun 5/181:45 pmLHR - PWM

2 stops14h 42mUnited Airlines

Deal found 4/12

$740

Wed 5/142:30 pmPWM - LHR

1 stop14h 30mDelta

Wed 5/218:40 amLHR - PWM

2 stops20h 19mDelta

Deal found 4/14

$702

Wed 5/142:30 pmPWM - LHR

1 stop13h 20mKLM

Wed 5/211:05 pmLHR - PWM

1 stop15h 54mKLM

Deal found 4/14

$715

Sun 5/183:17 pmPWM - LGW

2 stops18h 23mMultiple Airlines

Sun 5/252:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/14

$1,197

Sat 5/242:30 pmPWM - LHR

2 stops22h 10mScandinavian Airlines

Sat 5/316:40 amLHR - PWM

2 stops22h 34mScandinavian Airlines

Deal found 4/13

$916

One-way flights from Portland to London
Search for one-way flight options from Portland to London. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Mon 5/1211:50 amPWM - LGW

1 stop17h 10mMultiple Airlines

Deal found 4/13

$286

Mon 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

Deal found 4/13

$393

Mon 5/1211:50 amPWM - LHR

2 stops27h 30mMultiple Airlines

Deal found 4/13

$402

Wed 7/1610:51 amPWM - LHR

2 stops18h 09mAir Canada

Deal found 4/13

$475

Wed 7/1612:50 pmPWM - LGW

2 stops16h 10mDelta

Deal found 4/13

$479

Mon 5/1212:37 pmPWM - LCY

2 stops18h 53mUnited Airlines

Deal found 4/13

$486

Wed 7/162:35 pmPWM - LCY

2 stops13h 55mDelta

Deal found 4/13

$519

Wed 5/283:35 pmPWM - LHR

2 stops22h 15mTAP AIR PORTUGAL

Deal found 4/13

$575

Wed 6/1812:49 pmPWM - LGW

3 stops15h 36mWestJet

Deal found 4/13

$576

Wed 5/283:35 pmPWM - LGW

3 stops38h 45mTAP AIR PORTUGAL

Deal found 4/13

$588

Sun 6/156:03 amPWM - SEN

3 stops32h 32mMultiple Airlines

Deal found 4/13

$591

Sun 6/1512:49 pmPWM - LCY

3 stops25h 31mMultiple Airlines

Deal found 4/13

$607

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London that are best for you.

Fly from

Fly to

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

$623

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 8/11

4:16 pm-6:40 am

1 stop9h 24m

London Heathrow

Thu 8/21

12:15 pm-10:06 pm

1 stop14h 51m

$699

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/14

2:30 pm-10:00 am

1 stop14h 30m

London Heathrow

Wed 5/21

8:40 am-11:59 pm

2 stops20h 19m

$702

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/14

2:30 pm-8:50 am

1 stop13h 20m

London Heathrow

Wed 5/21

1:05 pm-11:59 pm

1 stop15h 54m

$715

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 5/11

3:43 pm-7:15 am

1 stop10h 32m

London Heathrow

Sun 5/18

1:45 pm-11:27 pm

2 stops14h 42m

$740

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 8/11

8:00 am-6:35 am

3 stops17h 35m

London Heathrow

Thu 8/21

8:30 am-11:01 pm

3 stops19h 31m

$751

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 4/29

6:35 am-9:55 am

2 stops22h 20m

London Gatwick

Sun 5/4

5:30 am-11:19 pm

2 stops22h 49m

$915

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 5/24

2:30 pm-5:40 pm

2 stops22h 10m

London Heathrow

Sat 5/31

6:40 am-12:14 am

2 stops22h 34m

$916

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 8/4

2:35 pm-10:00 am

1 stop14h 25m

London Gatwick

Sun 8/10

12:00 pm-11:45 pm

1 stop16h 45m

$1,094

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 7/18

2:35 pm-8:50 am

2 stops13h 15m

London City

Wed 7/23

9:20 am-11:45 pm

2 stops19h 25m

$1,125

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

Showing 1-10 of 31 results

Compare providers for flights from Portland to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to London in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Portland, Maine-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland, Maine-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Portland, Maine-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland, Maine-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to London

Have a flexible travel schedule? Discover the best time to fly to London 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 London

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

Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London (average of $661). Flying from Portland, Maine to London 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 LON?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 5% on flights from Portland, Maine to London by exploring options for tickets at noon.

Rainfall in London by month

In terms of precipitation, rainfall in London 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 London when rainfall is around 1.6 in.

Temperature in London by month

If weather is an important factor for your trip to London, 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 London

Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from Portland to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,916 reviews

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

7,916 reviews

Delta

8.0

Very good

7,916 reviews

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

1,323 reviews

Delta

8.0

Very good

7,916 reviews

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

7,916 reviews

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

8,656 reviews

Delta

8.0

Very good

7,916 reviews

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

642 reviews

Delta

8.0

Very good

7,916 reviews

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

What airport do you fly from for flights from Portland to London?
Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.
What are the cheapest airlines flying from Portland, Maine to London round-trip?
Flying on JetBlue is currently your cheapest option to London, with prices starting at $623. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $702 and $715, respectively. JetBlue is 27% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Portland, Maine to London one-way?
To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $393. Air Canada flights start at $475 while deals on Delta start at $479 one-way.
What are the most popular routes from Portland, Maine to London?
Most travelers choose Portland - London Heathrow, Portland - London Gatwick or Portland - London City when deciding on the best route from Portland, Maine to London.
Can I find deals for flights from Portland to London that include hotel bookings?
Yes. In addition to deals on Portland to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to London.
Can I find deals for business class flights from Portland to London?
Yes. Cheapflights offers flight deals from Portland to London 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 London?
Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London (average of $661). Flying from Portland, Maine to London 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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Top 3 airlines flying from Portland to London

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$586	Average$678	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$715	Average$951	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$789	Average$994	FlexibilityNo cancel fee	On-timeN/A

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$286+ Cheap flights from Portland, ME (PWM) to London (LON)

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to London with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to London

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to London

Cheapest flights from Portland to LondonExplore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London that are best for you.

Compare providers for flights from Portland to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to London in April.

Best time to book a flight from Portland to London

Have a flexible travel schedule? Discover the best time to fly to London from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to London

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

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

Find hourly flight availability from Portland to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 15, 2025.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from Portland to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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What are the cheapest airlines flying from Portland, Maine to London round-trip?

What are the cheapest airlines to fly from Portland, Maine to London one-way?

What are the most popular routes from Portland, Maine to London?

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

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Top 3 airlines flying from Portland to London

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Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.