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 $644. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Delta, with the lowest prices starting at $682 and $766, respectively. JetBlue is 25% 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 $530. Air Canada flights start at $838 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.

$530+ 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	$644 (JetBlue)
One-way from	$530 (JetBlue)
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 30, 2025.

Mon 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

Thu 5/1511:55 amLHR - PWM

1 stop16h 04mJetBlue

Deal found 4/28

$644

Wed 9/172:35 pmPWM - LHR

2 stops22h 05mScandinavian Airlines

Mon 9/2210:20 amLHR - PWM

2 stops18h 11mScandinavian Airlines

Deal found 4/28

$682

Sat 8/162:35 pmPWM - LGW

1 stop14h 25mDelta

Sat 8/2312:00 pmLGW - PWM

1 stop16h 45mDelta

Deal found 4/29

$766

Tue 11/256:00 amPWM - LHR

2 stops20h 10mAir Canada

Wed 12/36:00 pmLHR - PWM

2 stops34h 17mAir Canada

Deal found 4/28

$771

Tue 11/256:00 amPWM - LHR

1 stop9h 35mUnited Airlines

Wed 12/37:40 amLHR - PWM

2 stops16h 44mUnited Airlines

Deal found 4/28

$773

Mon 5/129:30 pmPWM - LGW

1 stop31h 30mMultiple Airlines

Thu 5/152:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/28

$777

Tue 11/2512:30 pmPWM - LHR

1 stop12h 55mKLM

Wed 12/312:30 pmLHR - PWM

1 stop14h 29mKLM

Deal found 4/28

$788

Tue 11/256:00 amPWM - LHR

3 stops19h 30mMultiple Airlines

Wed 12/39:00 amLHR - PWM

2 stops19h 17mMultiple Airlines

Deal found 4/28

$794

Sat 8/162:35 pmPWM - LHR

1 stop10h 50mDelta

Sat 8/234:50 pmLHR - PWM

1 stop11h 55mDelta

Deal found 4/29

$808

Fri 8/86:00 amPWM - LHR

1 stop19h 45mVirgin Atlantic

Thu 8/148:40 amLHR - PWM

2 stops20h 19mVirgin Atlantic

Deal found 4/29

$870

Fri 5/163:35 pmPWM - LGW

2 stops25h 45mTurkish Airlines

Mon 6/25:15 pmLGW - PWM

2 stops34h 45mTurkish Airlines

Deal found 4/28

$923

Fri 5/163:35 pmPWM - LHR

2 stops19h 25mTurkish Airlines

Sat 5/246:30 amLHR - PWM

2 stops21h 29mTurkish Airlines

Deal found 4/28

$963

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 30, 2025.

Mon 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

Thu 5/1511:55 amLHR - PWM

1 stop16h 04mJetBlue

Deal found 4/28

$644

Wed 9/172:35 pmPWM - LHR

2 stops22h 05mScandinavian Airlines

Mon 9/2210:20 amLHR - PWM

2 stops18h 11mScandinavian Airlines

Deal found 4/28

$682

Sat 8/162:35 pmPWM - LGW

1 stop14h 25mDelta

Sat 8/2312:00 pmLGW - PWM

1 stop16h 45mDelta

Deal found 4/29

$766

Mon 5/129:30 pmPWM - LGW

1 stop31h 30mMultiple Airlines

Thu 5/152:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/28

$777

Fri 8/153:04 pmPWM - LHR

2 stops48h 56mAir Canada

Mon 8/255:40 pmLHR - PWM

2 stops29h 46mAir Canada

Deal found 4/28

$827

Fri 8/156:00 amPWM - LHR

1 stop9h 40mUnited Airlines

Mon 8/259:30 amLHR - PWM

2 stops30h 27mUnited Airlines

Deal found 4/28

$865

Fri 8/86:00 amPWM - LHR

1 stop19h 45mVirgin Atlantic

Thu 8/148:40 amLHR - PWM

2 stops20h 19mVirgin Atlantic

Deal found 4/29

$870

Fri 8/1512:59 pmPWM - LHR

1 stop12h 46mKLM

Mon 8/254:05 pmLHR - PWM

1 stop12h 40mKLM

Deal found 4/28

$888

Fri 5/163:35 pmPWM - LGW

2 stops25h 45mTurkish Airlines

Mon 6/25:15 pmLGW - PWM

2 stops34h 45mTurkish Airlines

Deal found 4/28

$923

Thu 6/122:19 pmPWM - LGW

3 stops40h 01mTAP AIR PORTUGAL

Thu 6/1910:35 amLGW - PWM

2 stops18h 17mTAP AIR PORTUGAL

Deal found 4/28

$1,222

Sun 10/1910:40 amPWM - LHR

1 stop14h 15mAustrian Airlines

Sat 10/257:30 pmLHR - PWM

2 stops27h 43mAustrian Airlines

Deal found 4/29

$1,597

Sat 8/162:35 pmPWM - LHR

1 stop10h 50mDelta

Sat 8/234:50 pmLHR - PWM

1 stop11h 55mDelta

Deal found 4/29

$808

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated April 30, 2025 and is based on user searches.

Mon 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

Thu 5/1511:55 amLHR - PWM

1 stop16h 04mJetBlue

Deal found 4/28

$644

Mon 5/129:30 pmPWM - LGW

1 stop31h 30mMultiple Airlines

Thu 5/152:00 pmLGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 4/28

$777

Fri 5/163:35 pmPWM - LGW

2 stops25h 45mTurkish Airlines

Mon 6/25:15 pmLGW - PWM

2 stops34h 45mTurkish Airlines

Deal found 4/28

$923

Fri 5/1611:50 amPWM - LHR

1 stop15h 30mUnited Airlines

Mon 6/22:25 pmLHR - PWM

2 stops33h 52mUnited Airlines

Deal found 4/28

$941

Fri 5/163:35 pmPWM - LHR

2 stops19h 25mTurkish Airlines

Sat 5/246:30 amLHR - PWM

2 stops21h 29mTurkish Airlines

Deal found 4/28

$963

Fri 5/166:00 amPWM - LCY

2 stops24h 40mMultiple Airlines

Mon 6/27:10 pmLCY - PWM

2 stops29h 07mMultiple Airlines

Deal found 4/28

$990

Fri 5/162:30 pmPWM - LCY

2 stops16h 10mDelta

Sat 5/2410:00 amLCY - PWM

2 stops19h 14mDelta

Deal found 4/28

$1,034

Mon 5/262:30 pmPWM - LHR

1 stop13h 20mKLM

Mon 6/23:15 pmLHR - PWM

1 stop13h 44mKLM

Deal found 4/28

$1,164

Tue 5/276:35 amPWM - LHR

2 stops22h 00mScandinavian Airlines

Tue 6/37:05 amLHR - PWM

2 stops22h 09mScandinavian Airlines

Deal found 4/28

$1,056

Tue 5/272:30 pmPWM - LGW

1 stop14h 30mDelta

Tue 6/312:00 pmLGW - PWM

1 stop17h 14mDelta

Deal found 4/28

$1,062

Tue 5/276:10 amPWM - LHR

3 stops19h 20mAir Canada

Tue 6/38:45 amLHR - PWM

3 stops19h 42mAir Canada

Deal found 4/28

$1,098

Tue 5/276:10 amPWM - LHR

3 stops19h 20mMultiple Airlines

Tue 6/32:05 pmLHR - PWM

2 stops14h 22mMultiple Airlines

Deal found 4/28

$1,110

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 30, 2025.

Wed 6/186:10 amPWM - LHR

1 stop9h 35mJetBlue

Deal found 4/28

$530

Wed 6/182:19 pmPWM - LGW

2 stops16h 26mMultiple Airlines

Deal found 4/29

$822

Wed 6/186:20 amPWM - LHR

3 stops19h 10mAir Canada

Deal found 4/28

$838

Wed 6/182:34 pmPWM - LGW

1 stop14h 26mDelta

Deal found 4/28

$853

Wed 6/1812:49 pmPWM - LCY

2 stops14h 21mDelta

Deal found 4/28

$893

Wed 6/186:10 amPWM - LGW

2 stops29h 05mTurkish Airlines

Deal found 4/28

$990

Wed 6/182:19 pmPWM - LGW

3 stops40h 01mTAP AIR PORTUGAL

Deal found 4/28

$1,549

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

Thu 5/15

11:55 am-10:59 pm

1 stop16h 04m

$644

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 9/17

2:35 pm-5:40 pm

2 stops22h 05m

London Heathrow

Mon 9/22

10:20 am-11:31 pm

2 stops18h 11m

$682

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sat 8/16

2:35 pm-10:00 am

1 stop14h 25m

London Gatwick

Sat 8/23

12:00 pm-11:45 pm

1 stop16h 45m

$766

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 8/16

2:35 pm-6:25 am

1 stop10h 50m

London Heathrow

Sat 8/23

4:50 pm-11:45 pm

1 stop11h 55m

$808

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/15

3:04 pm-9:00 pm

2 stops48h 56m

London Heathrow

Mon 8/25

5:40 pm-6:26 pm

2 stops29h 46m

$827

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/8

4:06 pm-6:40 am

1 stop9h 34m

London Heathrow

Thu 8/14

1:30 pm-11:03 pm

1 stop14h 33m

$864

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/15

6:00 am-8:40 pm

1 stop9h 40m

London Heathrow

Mon 8/25

9:30 am-10:57 am

2 stops30h 27m

$865

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/8

6:00 am-6:45 am

1 stop19h 45m

London Heathrow

Thu 8/14

8:40 am-11:59 pm

2 stops20h 19m

$870

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/15

12:59 pm-6:45 am

1 stop12h 46m

London Heathrow

Mon 8/25

4:05 pm-11:45 pm

1 stop12h 40m

$888

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sat 6/14

7:25 pm-10:10 am

1 stop33h 45m

London Gatwick

Thu 6/19

2:00 pm-6:38 pm

1 stop33h 38m

$897

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 23 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

7,936 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

7,936 reviews

Delta

8.0

Very good

7,936 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

1,333 reviews

Delta

8.0

Very good

7,936 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

780 reviews

Delta

8.0

Very good

7,936 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

7,936 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

7,936 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 $644. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Delta, with the lowest prices starting at $682 and $766, respectively. JetBlue is 25% 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 $530. Air Canada flights start at $838 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 $1,110). 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$963	FlexibilityNo cancel fee	On-timeN/A

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$530+ 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

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

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 30, 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 30, 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 30, 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.

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?

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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 30, 2025.