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

JetBlue, at $674, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include Turkish Airlines and Scandinavian Airlines. These flights start at 30% lower than the current average price 3 months from now.

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 $864. 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland, Maine-London Heathrow Airport flight deals on Cheapflights vs. AranGrant >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 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 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.

$531+ Flights from Portland, ME to London Heathrow Airport

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Cheap flight deals from Portland to Heathrow

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	April
Average price	$789

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. 12% potential increase in price ($140 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($45 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 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 mayo 1, 2025.

mié. 5/73:35 pmPWM - LHR

1 stop12h 55mJetBlue

lun. 5/128:15 amLHR - PWM

1 stop11h 25mJetBlue

Deal found 4/30

$674

jue. 5/12:59 pmPWM - LHR

1 stop15h 26mDelta

jue. 5/89:00 amLHR - PWM

2 stops19h 59mDelta

Deal found 4/30

$925

mié. 5/76:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

lun. 5/127:30 pmLHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 4/30

$928

lun. 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

sáb. 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

vie. 6/62:30 pmPWM - LHR

2 stops18h 05mScandinavian Airlines

sáb. 6/146:40 amLHR - PWM

2 stops23h 06mScandinavian Airlines

Deal found 4/30

$1,039

vie. 6/64:04 pmPWM - LHR

1 stop10h 11mUnited Airlines

sáb. 6/141:45 pmLHR - PWM

2 stops14h 46mUnited Airlines

Deal found 4/30

$1,171

vie. 6/64:02 pmPWM - LHR

1 stop11h 03mAmerican Airlines

sáb. 6/1412:30 pmLHR - PWM

1 stop15h 33mAmerican Airlines

Deal found 4/30

$1,184

vie. 6/278:00 amPWM - LHR

3 stops17h 30mAir Canada

dom. 7/138:30 amLHR - PWM

3 stops20h 14mAir Canada

Deal found 4/30

$1,531

sáb. 7/1210:51 amPWM - LHR

1 stop28h 49mAustrian Airlines

lun. 7/213:05 pmLHR - PWM

2 stops32h 21mAustrian Airlines

Deal found 4/29

$2,287

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 mayo 1, 2025.

lun. 5/123:35 pmPWM - LHR

1 stop12h 55mJetBlue

sáb. 5/1711:55 amLHR - PWM

1 stop16h 04mJetBlue

Deal found 4/30

$674

lun. 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

sáb. 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

vie. 6/62:30 pmPWM - LHR

2 stops18h 05mScandinavian Airlines

sáb. 6/146:40 amLHR - PWM

2 stops23h 06mScandinavian Airlines

Deal found 4/30

$1,039

vie. 6/64:04 pmPWM - LHR

1 stop10h 11mUnited Airlines

sáb. 6/141:45 pmLHR - PWM

2 stops14h 46mUnited Airlines

Deal found 4/30

$1,171

vie. 6/64:02 pmPWM - LHR

1 stop11h 03mAmerican Airlines

sáb. 6/1412:30 pmLHR - PWM

1 stop15h 33mAmerican Airlines

Deal found 4/30

$1,184

dom. 6/2212:55 pmPWM - LHR

1 stop17h 15mDelta

dom. 6/298:40 amLHR - PWM

2 stops20h 46mDelta

Deal found 4/30

$1,384

dom. 6/226:20 amPWM - LHR

3 stops19h 10mMultiple Airlines

dom. 6/2912:05 pmLHR - PWM

2 stops16h 39mMultiple Airlines

Deal found 4/30

$1,411

vie. 6/278:00 amPWM - LHR

3 stops17h 30mAir Canada

dom. 7/138:30 amLHR - PWM

3 stops20h 14mAir Canada

Deal found 4/30

$1,531

sáb. 7/1210:51 amPWM - LHR

1 stop28h 49mAustrian Airlines

lun. 7/213:05 pmLHR - PWM

2 stops32h 21mAustrian Airlines

Deal found 4/29

$2,287

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

jue. 5/12:59 pmPWM - LHR

1 stop15h 26mDelta

jue. 5/89:00 amLHR - PWM

2 stops19h 59mDelta

Deal found 4/30

$925

mié. 5/73:35 pmPWM - LHR

1 stop12h 55mJetBlue

lun. 5/128:15 amLHR - PWM

1 stop11h 25mJetBlue

Deal found 4/30

$674

mié. 5/72:30 pmPWM - LHR

1 stop10h 55mDelta

lun. 5/129:00 amLHR - PWM

2 stops20h 14mDelta

Deal found 4/30

$925

mié. 5/76:00 amPWM - LHR

2 stops19h 30mMultiple Airlines

lun. 5/127:30 pmLHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 4/30

$928

mié. 5/76:00 amPWM - LHR

3 stops19h 30mAir Canada

lun. 5/128:00 amLHR - PWM

3 stops20h 27mAir Canada

Deal found 4/30

$2,283

mié. 5/76:35 amPWM - LHR

3 stops29h 25mScandinavian Airlines

lun. 5/127:05 amLHR - PWM

2 stops22h 09mScandinavian Airlines

Deal found 4/30

$2,327

lun. 5/123:35 pmPWM - LHR

2 stops37h 15mTurkish Airlines

sáb. 5/1710:25 pmLHR - PWM

2 stops53h 34mTurkish Airlines

Deal found 4/30

$1,018

lun. 5/124:01 pmPWM - LHR

1 stop13h 19mAmerican Airlines

sáb. 5/1712:15 pmLHR - PWM

2 stops15h 30mAmerican Airlines

Deal found 4/30

$1,713

lun. 5/126:00 amPWM - LHR

3 stops19h 30mAir Canada

sáb. 5/178:45 amLHR - PWM

3 stops19h 38mAir Canada

Deal found 4/30

$1,743

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 mayo 1, 2025.

mié. 6/182:19 pmPWM - LHR

1 stop14h 11mJetBlue

Deal found 4/30

$531

mié. 6/186:20 amPWM - LHR

2 stops19h 10mAir Canada

Deal found 4/30

$845

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

lun. 5/12

3:35 pm-9:30 am

1 stop12h 55m

London Heathrow

sáb. 5/17

11:55 am-10:59 pm

1 stop16h 04m

$674

PortlandLondon

PWM - LHR

PWMLHR

Portland

lun. 5/12

3:35 pm-9:50 am

2 stops37h 15m

London Heathrow

sáb. 5/17

10:25 pm-10:59 pm

2 stops53h 34m

$1,018

PortlandLondon

PWM - LHR

PWMLHR

Portland

vie. 6/6

2:30 pm-1:35 pm

2 stops18h 05m

London Heathrow

sáb. 6/14

6:40 am-12:46 am

2 stops23h 06m

$1,039

PortlandLondon

PWM - LHR

PWMLHR

Portland

vie. 6/6

4:04 pm-7:15 am

1 stop10h 11m

London Heathrow

sáb. 6/14

1:45 pm-11:31 pm

2 stops14h 46m

$1,171

PortlandLondon

PWM - LHR

PWMLHR

Portland

vie. 6/6

4:02 pm-8:05 am

1 stop11h 03m

London Heathrow

sáb. 6/14

12:30 pm-11:03 pm

1 stop15h 33m

$1,184

PortlandLondon

PWM - LHR

PWMLHR

Portland

dom. 6/22

12:55 pm-11:10 am

1 stop17h 15m

London Heathrow

dom. 6/29

8:40 am-12:26 am

2 stops20h 46m

$1,384

PortlandLondon

PWM - LHR

PWMLHR

Portland

dom. 6/22

6:20 am-6:30 am

3 stops19h 10m

London Heathrow

dom. 6/29

12:05 pm-11:44 pm

2 stops16h 39m

$1,411

PortlandLondon

PWM - LHR

PWMLHR

Portland

vie. 6/27

8:00 am-6:30 am

3 stops17h 30m

London Heathrow

dom. 7/13

8:30 am-11:44 pm

3 stops20h 14m

$1,531

PortlandLondon

PWM - LHR

PWMLHR

Portland

sáb. 7/12

10:51 am-8:40 pm

1 stop28h 49m

London Heathrow

lun. 7/21

3:05 pm-6:26 pm

2 stops32h 21m

$2,287

PortlandLondon

PWM - LHR

PWMLHR

Portland

mié. 6/18

2:19 pm-9:30 am

1 stop14h 11m

$531

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 11 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 May.

Provider	Price Accuracy	Trust Score*
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 Heathrow Airport 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 Heathrow Airport flight deals on Cheapflights vs. AranGrant >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 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 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 $1,103). 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 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

Read reviews from past customers who have flown Delta, Austrian Airlines and United Airlines from Portland to London. Users have also rated airlines 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 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 $674, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include Turkish Airlines and Scandinavian Airlines. These flights start at 30% lower than the current average price 3 months from now.
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 $1,103). 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 Heathrow

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 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to Heathrow

Most accurate provider

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 mayo 1, 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 mayo 1, 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 May.

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 mayo 1, 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

Read reviews from past customers who have flown Delta, Austrian Airlines and United Airlines from Portland to London. Users have also rated airlines 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 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?

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?

Browse thousands of different options on Cheapflights for your next trip

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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 mayo 1, 2025.