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 £504. Additional return tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at £594 and £597, respectively. Users have found that JetBlue is 34% 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?

£246 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 TAP AIR PORTUGAL, with prices starting from £337 and £392, 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.

£246+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£504
One-way from	£246
Popular in	June
Cheapest in	February
Average price	£719

JetBlue
20/9-30/9
2 total stops
29h 19m total
Portland to London

Search Deals

JetBlue
20/9
1 total stop
14h 15m total
Portland to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£136 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£26 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 31 March 2025.

Wed 1/1014:15PWM - LHR

1 stop14h 15mJetBlue

Tue 7/1011:55LHR - PWM

1 stop15h 04mJetBlue

Deal found 30/3£470

Wed 1/1014:35PWM - LHR

2 stops37h 45mScandinavian Airlines

Tue 7/1017:30LHR - PWM

2 stops35h 15mScandinavian Airlines

Deal found 30/3£545

Mon 10/1106:00PWM - LHR

1 stop9h 35mUnited Airlines

Tue 18/1114:30LHR - PWM

2 stops35h 57mUnited Airlines

Deal found 31/3£586

Mon 10/1106:00PWM - LHR

2 stops19h 30mAir Canada

Tue 18/1109:00LHR - PWM

2 stops43h 17mAir Canada

Deal found 30/3£592

Wed 1/1014:35PWM - LHR

1 stop10h 50mDelta

Tue 7/1006:30LHR - PWM

2 stops16h 20mDelta

Deal found 30/3£593

Mon 10/1113:06PWM - LHR

1 stop13h 44mMultiple Airlines

Tue 18/1113:10LHR - PWM

1 stop14h 18mMultiple Airlines

Deal found 31/3£596

Sat 20/914:35PWM - LHR

1 stop13h 15mKLM

Tue 30/909:20LHR - PWM

1 stop13h 39mKLM

Deal found 30/3£643

Thu 3/405:30PWM - LHR

1 stop20h 15mVirgin Atlantic

Wed 16/412:25LHR - PWM

2 stops15h 49mVirgin Atlantic

Deal found 31/3£735

Fri 18/416:16PWM - LHR

1 stop10h 49mAmerican Airlines

Sun 20/410:05LHR - PWM

1 stop17h 44mAmerican Airlines

Deal found 30/3£817

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/722:25LHR - PWM

2 stops30h 12mTurkish Airlines

Deal found 30/3£929

Sun 1/606:10PWM - LHR

1 stop20h 05mAustrian Airlines

Sat 7/619:30LHR - PWM

2 stops32h 58mAustrian Airlines

Deal found 30/3£1,011

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 31 March 2025.

Sat 20/914:15PWM - LHR

1 stop14h 15mJetBlue

Tue 30/911:55LHR - PWM

1 stop15h 04mJetBlue

Deal found 30/3£504

Sat 20/916:58PWM - LHR

1 stop32h 22mUnited Airlines

Tue 30/913:45LHR - PWM

2 stops14h 32mUnited Airlines

Deal found 30/3£594

Sat 20/906:00PWM - LHR

2 stops34h 00mAir Canada

Tue 30/914:05LHR - PWM

2 stops14h 12mAir Canada

Deal found 30/3£597

Sat 20/914:35PWM - LHR

1 stop13h 15mKLM

Tue 30/909:20LHR - PWM

1 stop13h 39mKLM

Deal found 30/3£643

Wed 14/506:00PWM - LHR

3 stops19h 30mMultiple Airlines

Wed 21/514:05LHR - PWM

2 stops14h 54mMultiple Airlines

Deal found 31/3£645

Thu 22/514:30PWM - LHR

2 stops22h 10mScandinavian Airlines

Sun 25/519:50LHR - PWM

2 stops33h 24mScandinavian Airlines

Deal found 31/3£748

Fri 18/414:59PWM - LHR

1 stop11h 16mDelta

Sun 20/408:40LHR - PWM

2 stops20h 19mDelta

Deal found 30/3£806

Fri 18/416:16PWM - LHR

1 stop10h 49mAmerican Airlines

Sun 20/410:05LHR - PWM

1 stop17h 44mAmerican Airlines

Deal found 30/3£817

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/722:25LHR - PWM

2 stops30h 12mTurkish Airlines

Deal found 30/3£929

Sun 1/606:10PWM - LHR

1 stop20h 05mAustrian Airlines

Sat 7/619:30LHR - PWM

2 stops32h 58mAustrian Airlines

Deal found 30/3£1,011

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 31 March 2025 and is based on user searches.

Thu 3/405:30PWM - LHR

1 stop20h 15mVirgin Atlantic

Wed 16/412:25LHR - PWM

2 stops15h 49mVirgin Atlantic

Deal found 31/3£735

Thu 3/406:15PWM - LHR

2 stops22h 45mAir Canada

Wed 16/417:40LHR - PWM

2 stops34h 47mAir Canada

Deal found 31/3£756

Mon 14/417:25PWM - LHR

1 stop11h 05mJetBlue

Fri 9/508:15LHR - PWM

1 stop11h 25mJetBlue

Deal found 31/3£581

Mon 14/414:15PWM - LHR

1 stop15h 25mMultiple Airlines

Fri 9/514:05LHR - PWM

2 stops28h 50mMultiple Airlines

Deal found 31/3£690

Mon 14/406:15PWM - LHR

1 stop19h 30mAustrian Airlines

Fri 9/510:25LHR - PWM

2 stops41h 58mAustrian Airlines

Deal found 31/3£4,029

Fri 18/414:59PWM - LHR

1 stop11h 16mDelta

Sun 20/408:40LHR - PWM

2 stops20h 19mDelta

Deal found 30/3£806

Fri 18/406:15PWM - LHR

2 stops19h 40mUnited Airlines

Sun 20/408:30LHR - PWM

2 stops18h 05mUnited Airlines

Deal found 30/3£810

Fri 18/416:16PWM - LHR

1 stop10h 49mAmerican Airlines

Sun 20/410:05LHR - PWM

1 stop17h 44mAmerican Airlines

Deal found 30/3£817

Sat 19/414:59PWM - LHR

2 stops20h 01mScandinavian Airlines

Sun 20/418:40LHR - PWM

2 stops35h 02mScandinavian Airlines

Deal found 30/3£1,948

Sun 20/414:59PWM - LHR

1 stop14h 16mKLM

Fri 25/416:05LHR - PWM

1 stop13h 37mKLM

Deal found 31/3£1,299

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 31 March 2025.

Sat 20/914:15PWM - LHR

1 stop14h 15mJetBlue

Deal found 30/3£246

Sun 21/906:00PWM - LHR

2 stops19h 30mAir Canada

Deal found 30/3£337

Wed 17/915:38PWM - LHR

3 stops41h 37mMultiple Airlines

Deal found 30/3£353

Wed 16/714:20PWM - LHR

2 stops23h 30mTAP AIR PORTUGAL

Deal found 30/3£392

Wed 17/912:50PWM - LHR

2 stops13h 25mDelta

Deal found 30/3£409

Wed 18/612:51PWM - LHR

2 stops18h 14mWestJet

Deal found 30/3£522

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 20/9

14:15-09:30

1 stop14h 15m

London Heathrow

Tue 30/9

11:55-21:59

1 stop15h 04m

£504

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 20/9

16:58-06:20

1 stop32h 22m

London Heathrow

Tue 30/9

13:45-23:17

2 stops14h 32m

£594

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 20/9

06:00-21:00

2 stops34h 00m

London Heathrow

Tue 30/9

14:05-23:17

2 stops14h 12m

£597

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 20/9

14:35-08:50

1 stop13h 15m

London Heathrow

Tue 30/9

09:20-17:59

1 stop13h 39m

£643

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 14/5

06:00-06:30

3 stops19h 30m

London Heathrow

Wed 21/5

14:05-23:59

2 stops14h 54m

£645

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 22/5

14:30-17:40

2 stops22h 10m

London Heathrow

Sun 25/5

19:50-00:14

2 stops33h 24m

£748

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 18/4

14:59-07:15

1 stop11h 16m

London Heathrow

Sun 20/4

08:40-23:59

2 stops20h 19m

£806

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 18/4

16:16-08:05

1 stop10h 49m

London Heathrow

Sun 20/4

10:05-22:49

1 stop17h 44m

£817

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/6

14:20-22:25

2 stops27h 05m

London Heathrow

Sun 13/7

22:25-23:37

2 stops30h 12m

£929

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 1/6

06:10-07:15

1 stop20h 05m

London Heathrow

Sat 7/6

19:30-23:28

2 stops32h 58m

£1,011

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 16 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

7,899 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

7,899 reviews

Delta

8.0

Very Good

7,899 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.

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very Good

7,899 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

7.6

Good

770 reviews

Delta

8.0

Very Good

7,899 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

8,614 reviews

Delta

8.0

Very Good

7,899 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

2,924 reviews

Delta

8.0

Very Good

7,899 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 £504. Additional return tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at £594 and £597, respectively. Users have found that JetBlue is 34% 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?
£246 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 TAP AIR PORTUGAL, with prices starting from £337 and £392, 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

Hounslow

Deal

Milton Keynes

Gatwick

Luton

Croydon

Slough

Eastbourne

Northampton

Wembley

Crawley

Winchester

Swindon

Southend-on-Sea

Maidstone

Hayes

Ipswich

Ilford

Southall

Dartford

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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 £246

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 20/9. 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 31 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 31 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 31 March 2025.