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 $521. Additional round-trip tickets that might be worth considering are offered by Delta and Scandinavian Airlines, with the lowest prices starting at $730 and $734, respectively. JetBlue is 38% 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 Delta, which is currently one of the cheapest options available, starting at $505. KLM flights start at $614 while deals on Air Canada start at $633 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 mornings when fares are most often at their lowest. Saturday evenings 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?

American Airlines, JetBlue and Delta 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 12% on the overall cost on flights from Portland, Maine to London.

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

February is one of the best times of the year to fly to London from Portland, Maine. Prices for February average $853 per person but you can even find prices for as low as $608. The most expensive prices can be found in the month of July. Opting for a February flight can save you 44% on your journey compared to booking in July

Most accurate provider : When it comes to deals on Portland, Maine-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-London flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 4 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.

$365+ Flights from Portland, ME to London

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Cheap flight deals from Portland to London

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	July
Cheapest in	February
Round-trip from	$521 (JetBlue)
One-way from	$365 (Kiwi.com)

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

High demand for flights, 31% potential price rise

Search Deals

Best time to find cheap flights, 25% potential price drop

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From Portland to London (LON)

Search Deals

One-way flight from Portland to London (LON)

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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 December 3, 2024.

Mon 12/306:05 amPWM - LHR

1 stop19h 15mDelta

Tue 1/146:30 amLHR - PWM

2 stops22h 27mDelta

Deal found 12/2

$730

Mon 12/306:05 amPWM - LHR

1 stop19h 15mVirgin Atlantic

Tue 1/142:30 pmLHR - PWM

1 stop14h 21mVirgin Atlantic

Deal found 12/2

$744

Mon 12/306:00 amPWM - LHR

2 stops33h 35mAir Canada

Tue 1/143:00 pmLHR - PWM

2 stops36h 30mAir Canada

Deal found 12/2

$825

Tue 12/247:16 pmPWM - LHR

1 stop10h 34mUnited Airlines

Tue 12/3112:05 pmLHR - PWM

2 stops16h 15mUnited Airlines

Deal found 12/2

$1,174

Tue 12/247:16 pmPWM - LHR

1 stop10h 34mMultiple Airlines

Fri 1/37:10 amLHR - PWM

2 stops16h 14mMultiple Airlines

Deal found 12/2

$1,561

Mon 12/3012:15 pmPWM - LHR

3 stops28h 20mScandinavian Airlines

Tue 1/146:40 amLHR - PWM

2 stops22h 17mScandinavian Airlines

Deal found 12/2

$2,064

Mon 12/2312:15 pmPWM - LCY

2 stops15h 35mDelta

Thu 1/27:45 amLCY - PWM

2 stops21h 25mDelta

Deal found 12/2

$2,264

Mon 12/2311:12 amPWM - LHR

1 stop28h 23mAustrian Airlines

Wed 1/18:00 amLHR - PWM

1 stop15h 24mAustrian Airlines

Deal found 12/2

$2,294

Mon 12/2311:12 amPWM - LGW

2 stops17h 38mMultiple Airlines

Tue 12/3110:40 amLGW - PWM

3 stops28h 51mMultiple Airlines

Deal found 12/2

$2,486

Wed 12/256:05 amPWM - LHR

1 stop20h 50mKLM

Fri 1/311:45 amLHR - PWM

2 stops16h 37mKLM

Deal found 12/2

$2,628

Tue 12/2411:12 amPWM - LCY

2 stops41h 13mMultiple Airlines

Fri 1/36:15 pmLCY - PWM

2 stops34h 22mMultiple Airlines

Deal found 12/2

$2,706

Mon 12/2312:57 pmPWM - LHR

1 stop12h 53mAir France

Sat 1/411:30 amLHR - PWM

2 stops16h 52mAir France

Deal found 12/2

$2,838

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 December 3, 2024.

Fri 4/45:30 pmPWM - LHR

1 stop11h 00mJetBlue

Thu 4/107:25 amLHR - PWM

1 stop14h 10mJetBlue

Deal found 12/1

$521

Mon 1/2712:06 pmPWM - LHR

1 stop19h 34mMultiple Airlines

Sun 2/22:35 pmLHR - PWM

2 stops25h 51mMultiple Airlines

Deal found 12/1

$679

Mon 12/306:05 amPWM - LHR

1 stop19h 15mDelta

Tue 1/146:30 amLHR - PWM

2 stops22h 27mDelta

Deal found 12/2

$730

Wed 3/122:35 pmPWM - LHR

2 stops14h 45mScandinavian Airlines

Mon 3/176:40 pmLHR - PWM

2 stops33h 26mScandinavian Airlines

Deal found 12/2

$734

Mon 12/306:05 amPWM - LHR

1 stop19h 15mVirgin Atlantic

Tue 1/142:30 pmLHR - PWM

1 stop14h 21mVirgin Atlantic

Deal found 12/2

$744

Tue 1/143:02 pmPWM - LHR

1 stop11h 53mKLM

Tue 1/212:30 pmLHR - PWM

1 stop14h 21mKLM

Deal found 12/2

$754

Mon 1/276:05 pmPWM - LHR

2 stops32h 05mAir Canada

Sun 2/211:10 amLHR - PWM

2 stops34h 42mAir Canada

Deal found 12/1

$768

Wed 3/124:11 pmPWM - LHR

1 stop10h 24mAmerican Airlines

Mon 3/179:50 amLHR - PWM

2 stops16h 52mAmerican Airlines

Deal found 12/2

$771

Fri 1/176:35 pmPWM - LHR

1 stop11h 30mUnited Airlines

Fri 1/243:00 pmLHR - PWM

2 stops28h 42mUnited Airlines

Deal found 12/3

$803

Fri 4/46:10 amPWM - LGW

2 stops25h 50mTurkish Airlines

Thu 4/1010:55 amLGW - PWM

2 stops41h 06mTurkish Airlines

Deal found 12/1

$906

Mon 1/272:24 pmPWM - LHR

2 stops13h 11mFinnair

Fri 1/318:15 amLHR - PWM

2 stops19h 13mFinnair

Deal found 12/1

$928

Tue 2/1111:36 amPWM - LHR

1 stop13h 44mAustrian Airlines

Sun 2/164:00 pmLHR - PWM

1 stop31h 31mAustrian Airlines

Deal found 12/2

$1,031

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated December 3, 2024 and is based on user searches.

Mon 12/306:05 amPWM - LHR

1 stop19h 15mDelta

Tue 1/146:30 amLHR - PWM

2 stops22h 27mDelta

Deal found 12/2

$730

Mon 12/306:05 amPWM - LHR

1 stop19h 15mVirgin Atlantic

Tue 1/142:30 pmLHR - PWM

1 stop14h 21mVirgin Atlantic

Deal found 12/2

$744

Mon 12/3012:15 pmPWM - LHR

3 stops28h 20mScandinavian Airlines

Tue 1/146:40 amLHR - PWM

2 stops22h 17mScandinavian Airlines

Deal found 12/2

$2,064

Mon 1/1312:48 pmPWM - LHR

1 stop15h 32mAmerican Airlines

Fri 1/179:50 amLHR - PWM

2 stops17h 38mAmerican Airlines

Deal found 12/2

$1,622

Tue 1/143:02 pmPWM - LHR

1 stop11h 53mKLM

Tue 1/212:30 pmLHR - PWM

1 stop14h 21mKLM

Deal found 12/2

$754

Tue 1/143:02 pmPWM - LCY

2 stops13h 28mDelta

Tue 1/2110:00 amLCY - PWM

2 stops18h 51mDelta

Deal found 12/2

$1,143

Fri 1/176:35 pmPWM - LHR

1 stop11h 30mUnited Airlines

Fri 1/243:00 pmLHR - PWM

2 stops28h 42mUnited Airlines

Deal found 12/3

$803

Mon 1/2712:06 pmPWM - LHR

1 stop19h 34mMultiple Airlines

Sun 2/22:35 pmLHR - PWM

2 stops25h 51mMultiple Airlines

Deal found 12/1

$679

Mon 1/276:05 pmPWM - LHR

2 stops32h 05mAir Canada

Sun 2/211:10 amLHR - PWM

2 stops34h 42mAir Canada

Deal found 12/1

$768

Mon 1/273:02 pmPWM - LCY

2 stops12h 08mKLM

Sun 2/28:05 pmLCY - PWM

2 stops32h 52mKLM

Deal found 12/1

$892

Mon 1/2712:06 pmPWM - LGW

1 stop16h 54mMultiple Airlines

Sun 2/211:40 amLGW - PWM

2 stops28h 46mMultiple Airlines

Deal found 12/1

$927

Mon 1/275:44 amPWM - LHR

1 stop22h 36mFinnair

Fri 1/318:15 amLHR - PWM

2 stops19h 13mFinnair

Deal found 12/1

$928

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 December 3, 2024.

Mon 12/99:13 pmPWM - LGW

2 stops32h 42mMultiple Airlines

Deal found 12/3

$365

Mon 12/3012:57 pmPWM - LCY

2 stops15h 33mDelta

Deal found 12/3

$505

Mon 12/166:05 amPWM - LHR

1 stop20h 50mDelta

Deal found 12/2

$518

Fri 12/139:13 pmPWM - LHR

2 stops41h 17mMultiple Airlines

Deal found 12/2

$533

Tue 12/172:55 pmPWM - LCY

2 stops21h 45mKLM

Deal found 12/3

$614

Sun 12/156:00 amPWM - LHR

2 stops33h 35mAir Canada

Deal found 12/2

$633

Sun 12/89:13 pmPWM - LCY

3 stops42h 27mMultiple Airlines

Deal found 12/3

$698

Thu 12/127:27 pmPWM - LHR

1 stop30h 13mUnited Airlines

Deal found 12/2

$713

Mon 12/1612:01 pmPWM - SEN

3 stops43h 04mMultiple Airlines

Deal found 12/2

$749

Mon 12/162:55 pmPWM - LHR

3 stops18h 40mScandinavian Airlines

Deal found 12/2

$2,390

Find flights from Portland to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 4/4

5:30 pm-9:30 am

1 stop11h 00m

London Heathrow

Thu 4/10

7:25 am-4:35 pm

1 stop14h 10m

$521

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 1/27

12:06 pm-12:40 pm

1 stop19h 34m

London Heathrow

Sun 2/2

2:35 pm-11:26 am

2 stops25h 51m

$679

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 12/30

6:05 am-6:20 am

1 stop19h 15m

London Heathrow

Tue 1/14

6:30 am-11:57 pm

2 stops22h 27m

$730

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 3/12

2:35 pm-9:20 am

2 stops14h 45m

London Heathrow

Mon 3/17

6:40 pm-12:06 am

2 stops33h 26m

$734

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 12/30

6:05 am-6:20 am

1 stop19h 15m

London Heathrow

Tue 1/14

2:30 pm-11:51 pm

1 stop14h 21m

$744

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 1/14

3:02 pm-7:55 am

1 stop11h 53m

London Heathrow

Tue 1/21

2:30 pm-11:51 pm

1 stop14h 21m

$754

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 1/27

6:05 pm-7:10 am

2 stops32h 05m

London Heathrow

Sun 2/2

11:10 am-4:52 pm

2 stops34h 42m

$768

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 3/12

4:11 pm-6:35 am

1 stop10h 24m

London Heathrow

Mon 3/17

9:50 am-10:42 pm

2 stops16h 52m

$771

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 1/17

6:35 pm-11:05 am

1 stop11h 30m

London Heathrow

Fri 1/24

3:00 pm-2:42 pm

2 stops28h 42m

$803

PortlandLondon

PWM - LCY

PWMLCY

Portland

Mon 1/27

3:02 pm-8:10 am

2 stops12h 08m

London City

Sun 2/2

8:05 pm-11:57 pm

2 stops32h 52m

$892

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 27 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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-London flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Travel insights for flights from Portland to London

Get recent, data-driven insights about flights from Portland to London including ideal travel times, pricing trends, and more.

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 $1,088). 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 7% 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 Turkish 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

8,694 reviews

Reviews

1 / 10

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

Delta

8.0

Very good

8,694 reviews

Delta

8.0

Very good

8,694 reviews

Reviews

1 / 10

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

KLM

7.8

Good

1,340 reviews

Delta

8.0

Very good

8,694 reviews

Reviews

1 / 10

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

Finnair

7.7

Good

1,297 reviews

Delta

8.0

Very good

8,694 reviews

Reviews

1 / 10

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

Virgin Atlantic

7.6

Good

665 reviews

Delta

8.0

Very good

8,694 reviews

Reviews

1 / 10

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

Austrian Airlines

7.6

Good

799 reviews

Delta

8.0

Very good

8,694 reviews

Reviews

1 / 10

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 4 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 $521. Additional round-trip tickets that might be worth considering are offered by Delta and Scandinavian Airlines, with the lowest prices starting at $730 and $734, respectively. JetBlue is 38% 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 Delta, which is currently one of the cheapest options available, starting at $505. KLM flights start at $614 while deals on Air Canada start at $633 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 $1,088). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Portland to London

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Top 4 airlines flying from Portland to London

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$602	Average$1,167	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$650	Average$920	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$670	Average$750	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$715	Average$926	FlexibilityNo cancel fee	On-time69%

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$365+ 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 12/9. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to London

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Round-trip from

One-way from

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 December 3, 2024.

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 December 3, 2024.

Find flights from Portland to London within your budget

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 December.

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.

Travel insights for flights from Portland to London

Get recent, data-driven insights about flights from Portland to London including ideal travel times, pricing trends, and more.

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 December 3, 2024.

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 Turkish 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.

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

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?

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

How can I find direct flights from Portland to London?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 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 December 3, 2024.