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$429+ Cheap flights from Portland (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 12/25. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LHR
Nov 5 — Nov 121
1 adult
Tue 11/5
Tue 11/12
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Cheap flight deals from Portland to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 31, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

January

Round-trip from

$662
(Scandinavian Airlines)

One-way from

$429
(Ovago)
Provider with most accurate pricing for Portland-London Heathrow flight deals.
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High demand for flights, 33% potential price rise
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Best time to find cheap flights, 25% potential price drop
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From Portland to London Heathrow
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One-way flight from Portland to London Heathrow
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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 October 31, 2024.

This Scandinavian Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/62:55 pmPWM - LHR
3 stops22h 35mScandinavian Airlines
Tue 12/106:40 amLHR - PWM
2 stops22h 19mScandinavian Airlines
Deal found 10/30$745
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/161:55 pmPWM - LHR
1 stop11h 45mUnited Airlines
Fri 12/278:55 amLHR - PWM
2 stops20h 04mUnited Airlines
Deal found 10/30$821
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1612:56 pmPWM - LHR
1 stop15h 24mAmerican Airlines
Fri 12/2710:15 amLHR - PWM
1 stop17h 46mAmerican Airlines
Deal found 10/30$837
This Orbitz deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2911:24 amPWM - LHR
2 stops19h 26mAir Canada
Fri 12/63:00 pmLHR - PWM
2 stops36h 50mAir Canada
Deal found 10/30$878
This KLM deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/202:55 pmPWM - LHR
1 stop12h 00mKLM
Wed 11/2712:30 pmLHR - PWM
1 stop16h 17mKLM
Deal found 10/30$881
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/295:00 amPWM - LHR
1 stop10h 10mDelta
Fri 12/611:45 amLHR - PWM
2 stops17h 14mDelta
Deal found 10/30$883
This Air Canada deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/204:13 pmPWM - LHR
2 stops14h 37mMultiple Airlines
Wed 11/279:00 amLHR - PWM
3 stops18h 50mMultiple Airlines
Deal found 10/30$892
This Aeromexico deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/112:51 pmPWM - LHR
2 stops22h 44mAir France
Sat 12/75:35 pmLHR - PWM
2 stops34h 42mAir France
Deal found 10/31$1,193
This KAYAK deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/46:10 amPWM - LHR
1 stop19h 10mVirgin Atlantic
Thu 11/78:50 amLHR - PWM
2 stops19h 30mVirgin Atlantic
Deal found 10/30$2,225

Find flights from Portland to Heathrow within your budget

Customize your flight search to find flights from Portland to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,570,725 searches. Data last updated October 31, 2024.

Fly from

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Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/25

12:15 pm-9:20 am

2 stops16h 05m

$429

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/25

6:00 am-6:35 am

1 stop19h 35m

$518

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 12/15

11:24 am-11:50 am

3 stops19h 26m

$524

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 12/26

5:05 am-6:50 am

1 stop20h 45m

$578

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/12

4:43 pm-12:50 pm

2 stops63h 07m

$619

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/12

9:40 am-10:50 am

1 stop20h 10m

$803

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 2/1

2:35 pm-9:20 pm

3 stops25h 45m

London Heathrow

Mon 2/3

6:40 am-11:31 pm

2 stops21h 51m

$662

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 4/17

5:30 pm-9:30 am

1 stop11h 00m

London Heathrow

Wed 4/23

11:55 am-11:01 pm

1 stop16h 06m

$726

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/10

4:11 pm-6:35 am

1 stop10h 24m

London Heathrow

Thu 3/20

9:50 am-10:16 pm

2 stops16h 26m

$774

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 1/7

6:05 pm-9:10 am

1 stop10h 05m

London Heathrow

Wed 5/14

3:50 pm-1:49 pm

2 stops26h 59m

$791

Flights are sorted by cheapest first

Deals found on 10/30

Showing 1-10 of 16 results
1
2

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 October.
ProviderPrice AccuracyTrust Score*Cancellation Policy
FlightHubPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
eDreamsPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
AranGrantPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy

*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 $649). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,089). 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?

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 October 31, 2024.

It’s typically best to fly out from Portland, Maine to London Heathrow Airport in the afternoon. Doing so could potentially save you 5% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Heathrow by month

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

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

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated October 31, 2024.
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,835 reviews
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,352 reviews
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.6
Good
666 reviews
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

JetBlue
7.5
Good
3,514 reviews
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,531 reviews
Delta
8.0
Very good
8,835 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    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 flights from Portland, Maine to London Heathrow Airport for under $700 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to London Heathrow Airport for under $700. The cheapest flight booked recently is on Scandinavian Airlines for just $662, but on average you can expect to pay $926.

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

    Scandinavian Airlines, at $662, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include American Airlines and United Airlines. These flights start at 29% 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 Scandinavian Airlines, with whom users have recently found tickets for as low as $429. However, be on the lookout for offers from KLM and Air Canada, as they are both options that can get you from Portland, Maine to London Heathrow Airport for a low price.

  • What does PWM to LHR mean?

    Great question - PWM to LHR just means Portland Airport to London Heathrow Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Portland to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your Portland to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Portland to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Portland to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Portland to Heathrow that allow pets onboard?

    Many airlines flying from Portland to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Portland to Heathrow?

    Yes, you can often find last-minute deals on Portland to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Portland, Maine to London Heathrow Airport flight deals updated?

    The Portland, Maine to London Heathrow Airport flight deals you see on this page were last updated on 10/31.

  • 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 $649). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,089). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Portland to Heathrow

Discover the top 3 airlines that operate flights from Portland to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,570,725 searches. Data last updated October 31, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$602Average$1,167FlexibilityNo cancel feeOn-time71%
DeltaCheapest$650Average$920FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$666Average$951FlexibilityNo cancel feeOn-time69%
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