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

JetBlue, at $589, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include United Airlines and Delta. These flights start at 41% 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 Air Canada, with whom users have recently found tickets for as low as $490. However, be on the lookout for offers from Virgin Atlantic and WestJet, 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. Saturday evenings 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 American Airlines, JetBlue or Delta 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 $888. 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 4 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.

$472+ 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	$589 (JetBlue)
One-way from	$472 (Kiwi.com)
Popular in	July
Cheapest in	January
Average price	$789

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

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

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From Portland to London Heathrow

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One-way flight from Portland to London Heathrow

Search Deals

Highest demand for flights based on searches. 22% potential increase in price ($301 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 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 February 21, 2025.

Sun 4/66:10 amPWM - LHR

1 stop9h 35mJetBlue

Sun 4/138:15 amLHR - PWM

1 stop13h 25mJetBlue

Deal found 2/20

$589

Mon 3/107:20 pmPWM - LHR

1 stop11h 30mUnited Airlines

Fri 3/283:00 pmLHR - PWM

2 stops36h 15mUnited Airlines

Deal found 2/19

$677

Mon 3/105:30 amPWM - LHR

1 stop20h 50mDelta

Wed 3/196:30 amLHR - PWM

2 stops20h 44mDelta

Deal found 2/20

$679

Mon 3/101:01 pmPWM - LHR

1 stop13h 34mMultiple Airlines

Wed 3/191:10 pmLHR - PWM

1 stop13h 47mMultiple Airlines

Deal found 2/20

$690

Mon 3/171:02 pmPWM - LHR

1 stop13h 48mKLM

Mon 3/244:35 pmLHR - PWM

1 stop11h 40mKLM

Deal found 2/20

$750

Sun 4/612:50 pmPWM - LHR

1 stop12h 50mAmerican Airlines

Sun 4/131:30 pmLHR - PWM

2 stops15h 24mAmerican Airlines

Deal found 2/19

$757

Sat 3/226:10 amPWM - LHR

2 stops21h 00mAir Canada

Sat 3/299:00 amLHR - PWM

2 stops42h 27mAir Canada

Deal found 2/20

$777

Sun 4/63:08 pmPWM - LHR

2 stops19h 52mScandinavian Airlines

Sun 4/137:50 pmLHR - PWM

2 stops33h 50mScandinavian Airlines

Deal found 2/19

$802

Sun 4/66:15 amPWM - LHR

2 stops31h 25mAustrian Airlines

Sun 4/133:05 pmLHR - PWM

2 stops37h 22mAustrian Airlines

Deal found 2/20

$851

Sun 6/226:10 amPWM - LHR

2 stops22h 40mTurkish Airlines

Sun 6/297:05 pmLHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 2/19

$1,211

Thu 2/205:34 amPWM - LHR

1 stop21h 21mVirgin Atlantic

Thu 2/276:30 amLHR - PWM

2 stops22h 25mVirgin Atlantic

Deal found 2/19

$1,634

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 February 21, 2025.

Sun 4/66:10 amPWM - LHR

1 stop9h 35mJetBlue

Sun 4/138:15 amLHR - PWM

1 stop13h 25mJetBlue

Deal found 2/20

$589

Mon 3/107:20 pmPWM - LHR

1 stop11h 30mUnited Airlines

Fri 3/283:00 pmLHR - PWM

2 stops36h 15mUnited Airlines

Deal found 2/19

$677

Mon 3/105:30 amPWM - LHR

1 stop20h 50mDelta

Wed 3/196:30 amLHR - PWM

2 stops20h 44mDelta

Deal found 2/20

$679

Mon 3/101:01 pmPWM - LHR

1 stop13h 34mMultiple Airlines

Wed 3/191:10 pmLHR - PWM

1 stop13h 47mMultiple Airlines

Deal found 2/20

$690

Mon 3/171:02 pmPWM - LHR

1 stop13h 48mKLM

Mon 3/244:35 pmLHR - PWM

1 stop11h 40mKLM

Deal found 2/20

$750

Sun 4/612:50 pmPWM - LHR

1 stop12h 50mAmerican Airlines

Sun 4/131:30 pmLHR - PWM

2 stops15h 24mAmerican Airlines

Deal found 2/19

$757

Sat 3/226:10 amPWM - LHR

2 stops21h 00mAir Canada

Sat 3/299:00 amLHR - PWM

2 stops42h 27mAir Canada

Deal found 2/20

$777

Sun 4/63:08 pmPWM - LHR

2 stops19h 52mScandinavian Airlines

Sun 4/137:50 pmLHR - PWM

2 stops33h 50mScandinavian Airlines

Deal found 2/19

$802

Sun 4/66:15 amPWM - LHR

2 stops31h 25mAustrian Airlines

Sun 4/133:05 pmLHR - PWM

2 stops37h 22mAustrian Airlines

Deal found 2/20

$851

Sun 6/226:10 amPWM - LHR

2 stops22h 40mTurkish Airlines

Sun 6/297:05 pmLHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 2/19

$1,211

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated February 21, 2025 and is based on user searches.

Thu 2/205:34 amPWM - LHR

1 stop21h 21mVirgin Atlantic

Thu 2/276:30 amLHR - PWM

2 stops22h 25mVirgin Atlantic

Deal found 2/19

$1,634

Mon 3/33:04 pmPWM - LHR

2 stops19h 56mScandinavian Airlines

Mon 3/176:40 amLHR - PWM

2 stops21h 35mScandinavian Airlines

Deal found 2/20

$933

Mon 3/34:13 pmPWM - LHR

1 stop12h 07mAmerican Airlines

Mon 3/179:50 amLHR - PWM

2 stops17h 07mAmerican Airlines

Deal found 2/20

$1,514

Mon 3/107:20 pmPWM - LHR

1 stop11h 30mUnited Airlines

Fri 3/283:00 pmLHR - PWM

2 stops36h 15mUnited Airlines

Deal found 2/19

$677

Mon 3/105:30 amPWM - LHR

1 stop20h 50mDelta

Wed 3/196:30 amLHR - PWM

2 stops20h 44mDelta

Deal found 2/20

$679

Mon 3/101:01 pmPWM - LHR

1 stop13h 34mMultiple Airlines

Wed 3/191:10 pmLHR - PWM

1 stop13h 47mMultiple Airlines

Deal found 2/20

$690

Wed 3/1211:20 amPWM - LHR

1 stop15h 35mAustrian Airlines

Mon 3/1712:05 pmLHR - PWM

2 stops34h 34mAustrian Airlines

Deal found 2/19

$1,356

Mon 3/171:02 pmPWM - LHR

1 stop13h 48mKLM

Mon 3/244:35 pmLHR - PWM

1 stop11h 40mKLM

Deal found 2/20

$750

Sat 3/226:10 amPWM - LHR

2 stops21h 00mAir Canada

Sat 3/299:00 amLHR - PWM

2 stops42h 27mAir Canada

Deal found 2/20

$777

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 February 21, 2025.

Fri 3/218:35 pmPWM - LHR

3 stops59h 55mMultiple Airlines

Deal found 2/19

$472

Fri 3/216:10 amPWM - LHR

2 stops49h 40mAir Canada

Deal found 2/19

$490

Fri 3/215:30 amPWM - LHR

1 stop20h 50mVirgin Atlantic

Deal found 2/19

$544

Wed 6/1812:50 pmPWM - LHR

2 stops18h 15mWestJet

Deal found 2/20

$624

Wed 6/182:20 pmPWM - LHR

2 stops20h 15mTAP AIR PORTUGAL

Deal found 2/19

$774

Wed 4/212:38 pmPWM - LHR

1 stop12h 37mBritish Airways

Deal found 2/19

$5,601

Find flights from Portland to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 4/6

6:10 am-8:45 pm

1 stop9h 35m

London Heathrow

Sun 4/13

8:15 am-4:40 pm

1 stop13h 25m

$589

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/10

7:20 pm-10:50 am

1 stop11h 30m

London Heathrow

Fri 3/28

3:00 pm-11:15 pm

2 stops36h 15m

$677

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/10

5:30 am-6:20 am

1 stop20h 50m

London Heathrow

Wed 3/19

6:30 am-11:14 pm

2 stops20h 44m

$679

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/10

1:01 pm-6:35 am

1 stop13h 34m

London Heathrow

Wed 3/19

1:10 pm-10:57 pm

1 stop13h 47m

$690

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/17

1:02 pm-6:50 am

1 stop13h 48m

London Heathrow

Mon 3/24

4:35 pm-12:15 am

1 stop11h 40m

$750

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 4/6

12:50 pm-6:40 am

1 stop12h 50m

London Heathrow

Sun 4/13

1:30 pm-11:54 pm

2 stops15h 24m

$757

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 3/22

6:10 am-7:10 am

2 stops21h 00m

London Heathrow

Sat 3/29

9:00 am-11:27 pm

2 stops42h 27m

$777

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 4/6

3:08 pm-4:00 pm

2 stops19h 52m

London Heathrow

Sun 4/13

7:50 pm-12:40 am

2 stops33h 50m

$802

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 4/6

6:15 am-6:40 pm

2 stops31h 25m

London Heathrow

Sun 4/13

3:05 pm-11:27 pm

2 stops37h 22m

$851

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/22

6:10 am-9:50 am

2 stops22h 40m

London Heathrow

Sun 6/29

7:05 pm-11:37 pm

2 stops33h 32m

$1,211

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 16 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 February.

Provider	Price Accuracy	Trust Score*
FlightHub	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.

Travel insights for flights from Portland to Heathrow

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

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 $1,136). 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

8,213 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

8,213 reviews

Delta

8.0

Very good

8,213 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

1,331 reviews

Delta

8.0

Very good

8,213 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

773 reviews

Delta

8.0

Very good

8,213 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

7.5

Good

654 reviews

Delta

8.0

Very good

8,213 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

8,759 reviews

Delta

8.0

Very good

8,213 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 4 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 $589, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include United Airlines and Delta. These flights start at 41% 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 Air Canada, with whom users have recently found tickets for as low as $490. However, be on the lookout for offers from Virgin Atlantic and WestJet, 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 $1,136). 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 4 airlines flying from Portland to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$586	Average$749	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$652	Average$954	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$708	Average$1,162	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$725	Average$953	FlexibilityNo cancel fee	On-time69%

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$472+ 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 3/21. 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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Cheap flight deals from Portland to Heathrow

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Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 February 21, 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 February 21, 2025.

Find flights from Portland to Heathrow within your budget

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 February.

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.

Travel insights for flights from Portland to Heathrow

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

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 February 21, 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 4 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 February 21, 2025.