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

JetBlue, at $638, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Air Canada. These flights start at 36% lower than the current average price 3 months from now.

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

The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $529. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Portland, Maine to London Heathrow Airport for a low price.

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

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

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

Consider JetBlue, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from Portland, Maine to London Heathrow Airport.

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

It’s generally more expensive to depart on a Saturday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

November can be a great time to fly to London Heathrow Airport from Portland, Maine with a flight ticket averaging about $879. Cheapflights users have found deals in the month of November for as cheap as $696. The most expensive prices can be found in the month of June.

Most accurate provider : When it comes to deals on Portland, Maine-London Heathrow Airport 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 Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-London Heathrow Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland, Maine-London Heathrow Airport 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 Heathrow Airport 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 Heathrow?

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London Heathrow. You should not have trouble finding flights to London Heathrow from Portland; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London Heathrow. 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 Heathrow that include hotel bookings?

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

How can I find direct flights from Portland to Heathrow?

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

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

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

$529+ Flights from Portland, ME to London Heathrow Airport

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Cheap flight deals from Portland to Heathrow

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$638 (JetBlue)
One-way from	$529 (JetBlue)
Popular in	June
Cheapest in	February
Average price	$931

Provider with most accurate pricing for Portland-London Heathrow flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-London Heathrow flights.

Search Deals

From Portland to London Heathrow

Search Deals

One-way flight from Portland to London Heathrow

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($227 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

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Find flight deals from Portland to Heathrow

Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Sat 4/265:35 pmPWM - LHR

1 stop10h 55mJetBlue

Fri 5/28:15 amLHR - PWM

1 stop11h 10mJetBlue

Deal found 3/26

$608

Fri 5/96:35 amPWM - LHR

2 stops27h 00mScandinavian Airlines

Tue 5/207:05 amLHR - PWM

2 stops22h 09mScandinavian Airlines

Deal found 3/26

$719

Wed 9/246:00 amPWM - LHR

1 stop9h 40mUnited Airlines

Wed 10/11:45 pmLHR - PWM

2 stops14h 32mUnited Airlines

Deal found 3/26

$814

Fri 9/511:47 amPWM - LHR

2 stops52h 13mAir Canada

Thu 10/29:30 amLHR - PWM

2 stops18h 47mAir Canada

Deal found 3/27

$819

Wed 8/136:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

Wed 9/36:00 amLHR - PWM

2 stops16h 30mMultiple Airlines

Deal found 3/26

$829

Wed 8/136:55 pmPWM - LHR

1 stop13h 35mKLM

Wed 9/34:05 pmLHR - PWM

1 stop12h 40mKLM

Deal found 3/26

$853

Wed 5/212:30 pmPWM - LHR

1 stop13h 45mDelta

Wed 5/2811:45 amLHR - PWM

2 stops17h 29mDelta

Deal found 3/26

$860

Fri 6/276:10 amPWM - LHR

2 stops33h 40mTurkish Airlines

Sun 7/134:40 pmLHR - PWM

2 stops25h 43mTurkish Airlines

Deal found 3/27

$1,216

Thu 4/176:15 amPWM - LHR

1 stop18h 40mAustrian Airlines

Thu 4/244:00 pmLHR - PWM

1 stop12h 27mAustrian Airlines

Deal found 3/25

$1,231

Sun 12/216:00 amPWM - LHR

1 stop19h 35mAmerican Airlines

Sat 1/312:55 pmLHR - PWM

2 stops15h 48mAmerican Airlines

Deal found 3/26

$1,397

Best flights from Portland to Heathrow
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Fri 5/93:35 pmPWM - LHR

1 stop12h 55mJetBlue

Tue 5/208:15 amLHR - PWM

1 stop11h 25mJetBlue

Deal found 3/27

$638

Fri 5/96:35 amPWM - LHR

2 stops28h 25mScandinavian Airlines

Tue 5/207:05 amLHR - PWM

2 stops22h 09mScandinavian Airlines

Deal found 3/27

$733

Fri 9/511:47 amPWM - LHR

2 stops52h 13mAir Canada

Thu 10/29:30 amLHR - PWM

2 stops18h 47mAir Canada

Deal found 3/27

$819

Mon 5/123:43 pmPWM - LHR

1 stop12h 37mUnited Airlines

Mon 5/191:45 pmLHR - PWM

2 stops14h 42mUnited Airlines

Deal found 3/28

$859

Fri 9/58:00 amPWM - LHR

3 stops17h 30mMultiple Airlines

Thu 10/212:05 pmLHR - PWM

2 stops16h 12mMultiple Airlines

Deal found 3/27

$901

Tue 4/156:15 amPWM - LHR

1 stop18h 40mAustrian Airlines

Tue 4/224:00 pmLHR - PWM

1 stop12h 27mAustrian Airlines

Deal found 3/27

$1,153

Fri 6/276:10 amPWM - LHR

2 stops33h 40mTurkish Airlines

Sun 7/134:40 pmLHR - PWM

2 stops25h 43mTurkish Airlines

Deal found 3/27

$1,216

Sun 6/222:34 pmPWM - LHR

1 stop13h 41mDelta

Sun 6/2911:30 amLHR - PWM

2 stops18h 16mDelta

Deal found 3/28

$1,384

Sun 4/205:20 amPWM - LHR

1 stop20h 55mVirgin Atlantic

Sat 4/261:05 pmLHR - PWM

1 stop15h 54mVirgin Atlantic

Deal found 3/26

$1,732

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated March 28, 2025 and is based on user searches.

Mon 3/314:11 pmPWM - LHR

2 stops12h 59mAmerican Airlines

Wed 4/210:05 amLHR - PWM

1 stop17h 52mAmerican Airlines

Deal found 3/27

$2,241

Thu 4/172:59 pmPWM - LHR

1 stop15h 26mDelta

Thu 4/248:40 amLHR - PWM

2 stops21h 02mDelta

Deal found 3/25

$998

Thu 4/176:15 amPWM - LHR

1 stop18h 40mAustrian Airlines

Thu 4/244:00 pmLHR - PWM

1 stop12h 27mAustrian Airlines

Deal found 3/25

$1,231

Thu 4/172:59 pmPWM - LHR

1 stop14h 16mKLM

Fri 4/254:05 pmLHR - PWM

1 stop13h 37mKLM

Deal found 3/25

$1,247

Fri 4/186:15 amPWM - LHR

3 stops19h 15mAir Canada

Fri 4/258:30 amLHR - PWM

3 stops19h 57mAir Canada

Deal found 3/25

$2,110

Fri 4/256:15 amPWM - LHR

2 stops19h 15mMultiple Airlines

Fri 5/26:00 amLHR - PWM

2 stops22h 27mMultiple Airlines

Deal found 3/26

$908

Fri 4/256:45 pmPWM - LHR

1 stop10h 55mUnited Airlines

Fri 5/22:05 pmLHR - PWM

2 stops29h 33mUnited Airlines

Deal found 3/26

$909

Sat 4/265:35 pmPWM - LHR

1 stop10h 55mJetBlue

Fri 5/28:15 amLHR - PWM

1 stop11h 10mJetBlue

Deal found 3/26

$608

Sat 4/262:59 pmPWM - LHR

3 stops22h 51mScandinavian Airlines

Fri 5/27:05 amLHR - PWM

2 stops22h 37mScandinavian Airlines

Deal found 3/26

$958

One-way flights from Portland to Heathrow
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Wed 6/186:10 amPWM - LHR

1 stop9h 35mJetBlue

Deal found 3/27

$529

Sat 4/194:15 pmPWM - LHR

1 stop10h 50mAmerican Airlines

Deal found 3/27

$538

Sun 4/205:20 amPWM - LHR

1 stop20h 25mDelta

Deal found 3/27

$548

Fri 4/182:59 pmPWM - LHR

1 stop14h 16mKLM

Deal found 3/27

$598

Wed 6/1812:51 pmPWM - LHR

2 stops18h 14mWestJet

Deal found 3/27

$600

Fri 4/185:53 pmPWM - LHR

2 stops40h 47mMultiple Airlines

Deal found 3/27

$792

Wed 6/186:10 amPWM - LHR

3 stops19h 20mAir Canada

Deal found 3/27

$867

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 4/26

5:35 pm-9:30 am

1 stop10h 55m

London Heathrow

Fri 5/2

8:15 am-2:25 pm

1 stop11h 10m

$608

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 5/9

6:35 am-2:35 pm

2 stops27h 00m

London Heathrow

Tue 5/20

7:05 am-12:14 am

2 stops22h 09m

$719

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 9/5

11:47 am-9:00 pm

2 stops52h 13m

London Heathrow

Thu 10/2

9:30 am-11:17 pm

2 stops18h 47m

$819

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 8/13

6:00 am-6:30 am

2 stops19h 30m

London Heathrow

Wed 9/3

6:00 am-5:30 pm

2 stops16h 30m

$829

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 8/13

7:15 pm-10:40 am

1 stop10h 25m

London Heathrow

Wed 9/3

2:05 pm-2:25 pm

2 stops29h 20m

$830

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 8/13

6:55 pm-1:30 pm

1 stop13h 35m

London Heathrow

Wed 9/3

4:05 pm-11:45 pm

1 stop12h 40m

$853

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/21

2:30 pm-9:15 am

1 stop13h 45m

London Heathrow

Wed 5/28

11:45 am-12:14 am

2 stops17h 29m

$860

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 6/27

6:10 am-8:50 pm

2 stops33h 40m

London Heathrow

Sun 7/13

4:40 pm-1:23 pm

2 stops25h 43m

$1,216

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 4/17

6:15 am-5:55 am

1 stop18h 40m

London Heathrow

Thu 4/24

4:00 pm-11:27 pm

1 stop12h 27m

$1,231

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 6/24

6:00 am-6:40 am

1 stop19h 40m

London Heathrow

Sat 7/5

10:05 am-8:30 pm

1 stop15h 25m

$1,589

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 18 results

Compare providers for flights from Portland to Heathrow

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

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star

*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 Heathrow Airport 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 Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-London Heathrow Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland, Maine-London Heathrow Airport 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 Heathrow Airport 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 Heathrow

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

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

Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of $661). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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 LHR?

It’s typically best to fly out from Portland, Maine to London Heathrow Airport in the afternoon. Doing so could potentially save you 10% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Delta

8.0

Very good

7,897 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

7,897 reviews

Delta

8.0

Very good

7,897 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

1,321 reviews

Delta

8.0

Very good

7,897 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

7.5

Good

769 reviews

Delta

8.0

Very good

7,897 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

8,603 reviews

Delta

8.0

Very good

7,897 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

634 reviews

Delta

8.0

Very good

7,897 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 Heathrow?
Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London Heathrow. You should not have trouble finding flights to London Heathrow from Portland; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London Heathrow. 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 Heathrow Airport round-trip?
JetBlue, at $638, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Air Canada. These flights start at 36% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Portland, Maine to London Heathrow Airport one-way?
The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $529. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Portland, Maine to London Heathrow Airport for a low price.
Can I find deals for flights from Portland to Heathrow that include hotel bookings?
Yes. In addition to deals on Portland to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Heathrow.
Can I find deals for business class flights from Portland to Heathrow?
Yes. Cheapflights offers flight deals from Portland to Heathrow 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 Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of $661). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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 Heathrow

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$586	Average$678	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$715	Average$953	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$765	Average$994	FlexibilityNo cancel fee	On-timeN/A

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$529+ Cheap flights from Portland, ME (PWM) to Heathrow (LHR)

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 Heathrow with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to Heathrow

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Most trusted provider

Round-trip from

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Popular in

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Find flight deals from Portland to Heathrow

Cheapest flights from Portland to HeathrowExplore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Portland to Heathrow

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 Heathrow in March.

Best time to book a flight from Portland to Heathrow

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Portland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Reviews of airlines servicing Heathrow

Related info for your journey

Find useful and relevant information for your journey from Portland to Heathrow. 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 Heathrow?

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

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

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

How can I find direct flights from Portland to Heathrow?

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

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

Traveling to a place near Portland?

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Alternative routes for Portland to Heathrow

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

Top 3 airlines flying from Portland to Heathrow

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Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.