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 $674. Additional round-trip tickets that might be worth considering are offered by Turkish Airlines and Scandinavian Airlines, with the lowest prices starting at $1,018 and $1,039, respectively. JetBlue is 22% 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 $531. Air Canada flights start at $845 while deals on Delta start at $853 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 Gatwick, Portland - London Heathrow 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.

$531+ Flights from Portland, ME to London

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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	$674 (JetBlue)
One-way from	$531 (JetBlue)
Popular in	June
Cheapest in	November
Average price	$769

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 May 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 May 1, 2025.

Wed 5/73:35 pmPWM - LHR

1 stop12h 55mJetBlue

Mon 5/128:15 amLHR - PWM

1 stop11h 25mJetBlue

Deal found 4/30

$674

Thu 5/12:59 pmPWM - LHR

1 stop15h 26mDelta

Thu 5/89:00 amLHR - PWM

2 stops19h 59mDelta

Deal found 4/30

$925

Wed 5/76:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

Mon 5/127:30 pmLHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 4/30

$928

Wed 5/73:35 pmPWM - LGW

2 stops19h 40mTurkish Airlines

Mon 5/125:30 amLGW - PWM

2 stops22h 29mTurkish Airlines

Deal found 4/30

$995

Thu 5/12:37 pmPWM - LCY

2 stops16h 53mMultiple Airlines

Thu 5/88:45 amLCY - PWM

2 stops17h 31mMultiple Airlines

Deal found 4/30

$1,005

Mon 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

Sat 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

Fri 6/62:30 pmPWM - LHR

2 stops18h 05mScandinavian Airlines

Sat 6/146:40 amLHR - PWM

2 stops23h 06mScandinavian Airlines

Deal found 4/30

$1,039

Mon 5/1211:50 amPWM - LGW

2 stops21h 45mMultiple Airlines

Sat 5/1712:40 pmLGW - PWM

2 stops15h 43mMultiple Airlines

Deal found 4/30

$1,043

Fri 6/62:30 pmPWM - LGW

1 stop14h 30mDelta

Sat 6/1412:00 pmLGW - PWM

1 stop17h 46mDelta

Deal found 4/30

$1,167

Fri 6/64:04 pmPWM - LHR

1 stop10h 11mUnited Airlines

Sat 6/141:45 pmLHR - PWM

2 stops14h 46mUnited Airlines

Deal found 4/30

$1,171

Fri 6/64:02 pmPWM - LHR

1 stop11h 03mAmerican Airlines

Sat 6/1412:30 pmLHR - PWM

1 stop15h 33mAmerican Airlines

Deal found 4/30

$1,184

Fri 6/278:00 amPWM - LHR

3 stops17h 30mAir Canada

Sun 7/138:30 amLHR - PWM

3 stops20h 14mAir Canada

Deal found 4/30

$1,531

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 May 1, 2025.

Mon 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

Sat 5/1711:55 amLHR - PWM

1 stop16h 04mJetBlue

Deal found 4/30

$674

Mon 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

Sat 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

Fri 6/62:30 pmPWM - LHR

2 stops18h 05mScandinavian Airlines

Sat 6/146:40 amLHR - PWM

2 stops23h 06mScandinavian Airlines

Deal found 4/30

$1,039

Mon 5/1211:50 amPWM - LGW

2 stops21h 45mMultiple Airlines

Sat 5/1712:40 pmLGW - PWM

2 stops15h 43mMultiple Airlines

Deal found 4/30

$1,043

Fri 6/62:30 pmPWM - LGW

1 stop14h 30mDelta

Sat 6/1412:00 pmLGW - PWM

1 stop17h 46mDelta

Deal found 4/30

$1,167

Fri 6/64:04 pmPWM - LHR

1 stop10h 11mUnited Airlines

Sat 6/141:45 pmLHR - PWM

2 stops14h 46mUnited Airlines

Deal found 4/30

$1,171

Fri 6/64:02 pmPWM - LHR

1 stop11h 03mAmerican Airlines

Sat 6/1412:30 pmLHR - PWM

1 stop15h 33mAmerican Airlines

Deal found 4/30

$1,184

Fri 6/278:00 amPWM - LHR

3 stops17h 30mAir Canada

Sun 7/138:30 amLHR - PWM

3 stops20h 14mAir Canada

Deal found 4/30

$1,531

Sun 6/222:19 pmPWM - LGW

3 stops40h 01mTAP AIR PORTUGAL

Sun 6/2910:35 amLGW - PWM

2 stops18h 17mTAP AIR PORTUGAL

Deal found 4/30

$2,108

Sat 7/1210:51 amPWM - LHR

1 stop28h 49mAustrian Airlines

Mon 7/213:05 pmLHR - PWM

2 stops32h 21mAustrian Airlines

Deal found 4/29

$2,287

Fri 6/272:19 pmPWM - LGW

2 stops27h 01mTurkish Airlines

Sun 7/132:00 pmLGW - PWM

2 stops28h 23mTurkish Airlines

Deal found 4/30

$1,287

Sun 6/2212:55 pmPWM - LHR

1 stop17h 15mDelta

Sun 6/298:40 amLHR - PWM

2 stops20h 46mDelta

Deal found 4/30

$1,384

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated May 1, 2025 and is based on user searches.

Thu 5/12:59 pmPWM - LHR

1 stop15h 26mDelta

Thu 5/89:00 amLHR - PWM

2 stops19h 59mDelta

Deal found 4/30

$925

Thu 5/12:37 pmPWM - LCY

2 stops16h 53mMultiple Airlines

Thu 5/88:45 amLCY - PWM

2 stops17h 31mMultiple Airlines

Deal found 4/30

$1,005

Wed 5/73:35 pmPWM - LHR

1 stop12h 55mJetBlue

Mon 5/128:15 amLHR - PWM

1 stop11h 25mJetBlue

Deal found 4/30

$674

Wed 5/72:30 pmPWM - LHR

1 stop10h 55mDelta

Mon 5/129:00 amLHR - PWM

2 stops20h 14mDelta

Deal found 4/30

$925

Wed 5/76:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

Mon 5/127:30 pmLHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 4/30

$928

Wed 5/73:35 pmPWM - LGW

2 stops19h 40mTurkish Airlines

Mon 5/125:30 amLGW - PWM

2 stops22h 29mTurkish Airlines

Deal found 4/30

$995

Wed 5/79:30 amPWM - LCY

2 stops22h 00mMultiple Airlines

Mon 5/128:10 amLCY - PWM

2 stops16h 01mMultiple Airlines

Deal found 4/30

$1,039

Wed 5/73:35 pmPWM - LGW

1 stop11h 35mMultiple Airlines

Mon 5/123:05 pmLGW - PWM

1 stop12h 54mMultiple Airlines

Deal found 4/30

$1,291

Wed 5/76:00 amPWM - LHR

3 stops19h 30mAir Canada

Mon 5/128:00 amLHR - PWM

3 stops20h 27mAir Canada

Deal found 4/30

$2,283

Wed 5/76:35 amPWM - LHR

3 stops29h 25mScandinavian Airlines

Mon 5/127:05 amLHR - PWM

2 stops22h 09mScandinavian Airlines

Deal found 4/30

$2,327

Mon 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

Sat 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

Mon 5/1211:50 amPWM - LGW

2 stops21h 45mMultiple Airlines

Sat 5/1712:40 pmLGW - PWM

2 stops15h 43mMultiple Airlines

Deal found 4/30

$1,043

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 May 1, 2025.

Wed 6/182:19 pmPWM - LHR

1 stop14h 11mJetBlue

Deal found 4/30

$531

Wed 6/182:19 pmPWM - LGW

2 stops16h 26mMultiple Airlines

Deal found 4/30

$821

Wed 6/186:20 amPWM - LHR

2 stops19h 10mAir Canada

Deal found 4/30

$845

Wed 6/182:34 pmPWM - LGW

1 stop14h 26mDelta

Deal found 4/30

$853

Wed 6/1812:49 pmPWM - LCY

2 stops14h 21mDelta

Deal found 4/30

$893

Wed 6/182:19 pmPWM - LGW

3 stops25h 11mTAP AIR PORTUGAL

Deal found 4/30

$1,552

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

Mon 5/12

3:35 pm-9:30 am

1 stop12h 55m

London Heathrow

Sat 5/17

11:55 am-10:59 pm

1 stop16h 04m

$674

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/12

3:35 pm-9:50 am

2 stops37h 15m

London Heathrow

Sat 5/17

10:25 pm-10:59 pm

2 stops53h 34m

$1,018

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 6/6

2:30 pm-1:35 pm

2 stops18h 05m

London Heathrow

Sat 6/14

6:40 am-12:46 am

2 stops23h 06m

$1,039

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 5/12

11:50 am-2:35 pm

2 stops21h 45m

London Gatwick

Sat 5/17

12:40 pm-11:23 pm

2 stops15h 43m

$1,043

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 6/6

2:30 pm-10:00 am

1 stop14h 30m

London Gatwick

Sat 6/14

12:00 pm-12:46 am

1 stop17h 46m

$1,167

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 6/6

4:04 pm-7:15 am

1 stop10h 11m

London Heathrow

Sat 6/14

1:45 pm-11:31 pm

2 stops14h 46m

$1,171

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 6/6

4:02 pm-8:05 am

1 stop11h 03m

London Heathrow

Sat 6/14

12:30 pm-11:03 pm

1 stop15h 33m

$1,184

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 6/27

2:19 pm-10:20 pm

2 stops27h 01m

London Gatwick

Sun 7/13

2:00 pm-1:23 pm

2 stops28h 23m

$1,287

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/22

12:55 pm-11:10 am

1 stop17h 15m

London Heathrow

Sun 6/29

8:40 am-12:26 am

2 stops20h 46m

$1,384

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/22

6:20 am-6:30 am

3 stops19h 10m

London Heathrow

Sun 6/29

12:05 pm-11:44 pm

2 stops16h 39m

$1,411

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 20 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 May.

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 $1,103). 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, Austrian Airlines and United 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

7,934 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

7,934 reviews

Delta

8.0

Very good

7,934 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

781 reviews

Delta

8.0

Very good

7,934 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

8,696 reviews

Delta

8.0

Very good

7,934 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.

JetBlue

7.3

Good

2,922 reviews

Delta

8.0

Very good

7,934 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.

Turkish Airlines

7.3

Good

3,790 reviews

Delta

8.0

Very good

7,934 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 $674. Additional round-trip tickets that might be worth considering are offered by Turkish Airlines and Scandinavian Airlines, with the lowest prices starting at $1,018 and $1,039, respectively. JetBlue is 22% 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 $531. Air Canada flights start at $845 while deals on Delta start at $853 one-way.
What are the most popular routes from Portland, Maine to London?
Most travelers choose Portland - London Gatwick, Portland - London Heathrow 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 $1,103). 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$963	FlexibilityNo cancel fee	On-timeN/A

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$531+ 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 6/18. 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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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 May 1, 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 May 1, 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 May.

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 May 1, 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

Get insights into the airlines that provide service to London. 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 London. Reviews last updated May 1, 2025.

Read reviews from past customers who have flown Delta, Austrian Airlines and United 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?

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Alternative routes for Portland 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 May 1, 2025.