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

Flying on JetBlue is currently your cheapest option to London Heathrow Airport, with prices starting at £493. Additional return tickets that might be worth considering are offered by United Airlines and Scandinavian Airlines, with the lowest prices starting at £664 and £881, respectively. Users have found that JetBlue is 36% cheaper than the other options available to this destination.

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

£339 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from £460 and £555, respectively.

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

Flights from Portland, Maine to London Heathrow Airport lean towards being more expensive in June. Prices are generally better when you fly from Portland, Maine to London Heathrow Airport in November, with the cheapest ticket starting at £538.

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

When flying from Portland, Maine to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Portland to London Heathrow?

For a flight from Portland to London Heathrow, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Portland on a regular basis.

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 holiday 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.

£339+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£493
One-way from	£339
Popular in	June
Cheapest in	February
Average price	£719

JetBlue
12/5-19/5
2 total stops
24h 20m total
Portland to London

Search Deals

JetBlue
16/8
1 total stop
9h 35m total
Portland to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£135 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

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 29 March 2025.

Wed 1/1014:15PWM - LHR

1 stop14h 15mJetBlue

Tue 7/1011:55LHR - PWM

1 stop15h 04mJetBlue

Deal found 27/3£470

Wed 1/1014:35PWM - LHR

2 stops37h 45mScandinavian Airlines

Tue 7/1019:30LHR - PWM

2 stops33h 15mScandinavian Airlines

Deal found 27/3£540

Wed 1/1006:00PWM - LHR

1 stop19h 20mUnited Airlines

Tue 7/1014:05LHR - PWM

2 stops32h 25mUnited Airlines

Deal found 27/3£586

Wed 8/1006:00PWM - LHR

2 stops19h 30mAir Canada

Sun 12/1009:30LHR - PWM

2 stops18h 47mAir Canada

Deal found 28/3£636

Wed 8/1012:47PWM - LHR

1 stop17h 38mMultiple Airlines

Sun 12/1009:30LHR - PWM

2 stops15h 58mMultiple Airlines

Deal found 28/3£643

Sat 29/305:29PWM - LHR

1 stop10h 41mDelta

Fri 4/409:55LHR - PWM

2 stops19h 04mDelta

Deal found 27/3£767

Fri 26/1213:14PWM - LHR

1 stop12h 21mAmerican Airlines

Wed 31/1213:10LHR - PWM

1 stop14h 19mAmerican Airlines

Deal found 28/3£894

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/719:05LHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 28/3£940

Sun 8/606:10PWM - LHR

1 stop20h 05mAustrian Airlines

Sat 14/619:30LHR - PWM

2 stops32h 58mAustrian Airlines

Deal found 28/3£1,013

Best flights from Portland to Heathrow
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 March 2025.

Mon 12/515:35PWM - LHR

1 stop12h 55mJetBlue

Mon 19/508:15LHR - PWM

1 stop11h 25mJetBlue

Deal found 28/3£493

Mon 12/515:43PWM - LHR

1 stop12h 37mUnited Airlines

Mon 19/513:45LHR - PWM

2 stops14h 42mUnited Airlines

Deal found 28/3£664

Sun 22/606:30PWM - LHR

2 stops22h 05mScandinavian Airlines

Sun 29/615:35LHR - PWM

2 stops38h 11mScandinavian Airlines

Deal found 28/3£881

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/719:05LHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 28/3£940

Sun 8/606:10PWM - LHR

1 stop20h 05mAustrian Airlines

Sat 14/619:30LHR - PWM

2 stops32h 58mAustrian Airlines

Deal found 28/3£1,013

Sun 22/614:34PWM - LHR

1 stop13h 41mDelta

Sun 29/611:30LHR - PWM

2 stops18h 16mDelta

Deal found 28/3£1,069

Fri 27/608:00PWM - LHR

3 stops17h 30mAir Canada

Sun 13/708:30LHR - PWM

3 stops20h 14mAir Canada

Deal found 28/3£1,139

Sun 8/606:10PWM - LHR

3 stops19h 20mMultiple Airlines

Sat 14/612:40LHR - PWM

2 stops15h 51mMultiple Airlines

Deal found 28/3£1,455

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 29 March 2025 and is based on user searches.

Sat 29/315:55PWM - LHR

2 stops33h 35mAir Canada

Sun 6/414:05LHR - PWM

2 stops28h 31mAir Canada

Deal found 27/3£760

Sat 29/305:29PWM - LHR

1 stop10h 41mDelta

Fri 4/409:55LHR - PWM

2 stops19h 04mDelta

Deal found 27/3£767

Sat 29/315:00PWM - LHR

1 stop14h 15mKLM

Sun 6/415:15LHR - PWM

1 stop14h 08mKLM

Deal found 27/3£816

Sat 29/315:55PWM - LHR

2 stops13h 45mUnited Airlines

Sat 5/412:40LHR - PWM

2 stops15h 47mUnited Airlines

Deal found 27/3£820

Sun 30/317:35PWM - LHR

1 stop10h 55mJetBlue

Fri 4/411:55LHR - PWM

1 stop16h 45mJetBlue

Deal found 27/3£551

Sun 30/306:00PWM - LHR

2 stops23h 00mMultiple Airlines

Sat 5/419:30LHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 27/3£766

Tue 1/416:11PWM - LHR

2 stops13h 09mAmerican Airlines

Thu 3/410:05LHR - PWM

1 stop17h 52mAmerican Airlines

Deal found 28/3£1,731

Tue 1/415:00PWM - LHR

3 stops25h 20mScandinavian Airlines

Thu 3/407:05LHR - PWM

3 stops22h 18mScandinavian Airlines

Deal found 28/3£1,793

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 29 March 2025.

Sat 16/806:10PWM - LHR

1 stop9h 35mJetBlue

Deal found 28/3£339

Sat 16/818:18PWM - LHR

2 stops36h 37mMultiple Airlines

Deal found 28/3£384

Sat 16/808:00PWM - LHR

3 stops17h 30mAir Canada

Deal found 28/3£460

Wed 18/617:00PWM - LHR

2 stops38h 05mWestJet

Deal found 28/3£555

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

Mon 12/5

15:35-09:30

1 stop12h 55m

London Heathrow

Mon 19/5

08:15-14:40

1 stop11h 25m

£493

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 12/5

15:43-09:20

1 stop12h 37m

London Heathrow

Mon 19/5

13:45-23:27

2 stops14h 42m

£664

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 22/6

06:30-09:35

2 stops22h 05m

London Heathrow

Sun 29/6

15:35-00:46

2 stops38h 11m

£881

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/6

14:20-22:25

2 stops27h 05m

London Heathrow

Sun 13/7

19:05-23:37

2 stops33h 32m

£940

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 8/6

06:10-07:15

1 stop20h 05m

London Heathrow

Sat 14/6

19:30-23:28

2 stops32h 58m

£1,013

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 22/6

14:34-09:15

1 stop13h 41m

London Heathrow

Sun 29/6

11:30-00:46

2 stops18h 16m

£1,069

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/6

08:00-06:30

3 stops17h 30m

London Heathrow

Sun 13/7

08:30-23:44

3 stops20h 14m

£1,139

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 8/6

06:10-06:30

3 stops19h 20m

London Heathrow

Sat 14/6

12:40-23:31

2 stops15h 51m

£1,455

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 16/8

06:10-20:45

1 stop9h 35m

£339

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 16/8

18:18-11:55

2 stops36h 37m

£384

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 12 results

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 return 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, January is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of £112). Flying from Portland, Maine to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Delta

8.0

Very Good

7,895 reviews

Check prices

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

7,895 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

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

7,895 reviews

Check prices

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

8,609 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

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

7,895 reviews

Check prices

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

3,744 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

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?
For a flight from Portland to London Heathrow, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Portland on a regular basis.
What are the cheapest airlines flying from Portland, Maine to London Heathrow Airport round-trip?
Flying on JetBlue is currently your cheapest option to London Heathrow Airport, with prices starting at £493. Additional return tickets that might be worth considering are offered by United Airlines and Scandinavian Airlines, with the lowest prices starting at £664 and £881, respectively. Users have found that JetBlue is 36% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Portland, Maine to London Heathrow Airport one-way?
£339 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from £460 and £555, respectively.
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 holiday 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, January is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of £112). Flying from Portland, Maine to London Heathrow Airport in August is currently the most expensive (average of £164). 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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Deal

Milton Keynes

Gatwick

Croydon

Luton

Slough

Eastbourne

Wembley

Northampton

Swindon

Hayes

Ilford

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Winchester

Maidstone

Ipswich

Watford

Southall

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How does Cheapflights help users find flights from Portland to Heathrow?

Deals for Portland to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portland to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portland to Heathrow.

Can Cheapflights find flights from Portland to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from Portland to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from Portland to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Portland, Maine to London Heathrow Airport from £339

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 16/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to Heathrow

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 29 March 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 29 March 2025.

Cheapflights Fare Finder

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

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?

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?

Travelling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Heathrow

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Portland to Heathrow?

Can Cheapflights find flights from Portland to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Portland to Heathrow become cheaper?

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Travel Smart

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 29 March 2025.