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 £461. Additional return tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at £614 and £619, respectively. Users have found that JetBlue is 37% 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?

£279 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Lufthansa and Scandinavian Airlines, with prices starting from £423 and £530, 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 £526.

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.

£279+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£461
One-way from	£279
Popular in	June
Cheapest in	April
Average price	£553

JetBlue
29/4-4/5
2 total stops
22h 05m total
Portland to London

Search Deals

JetBlue
29/4
1 total stop
10h 55m total
Portland to London

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£79 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 18 April 2025.

Mon 11/806:10PWM - LHR

1 stop9h 35mJetBlue

Mon 22/911:55LHR - PWM

1 stop15h 04mJetBlue

Deal found 17/4£561

Mon 11/818:20PWM - LHR

1 stop12h 25mUnited Airlines

Mon 22/914:05LHR - PWM

2 stops25h 43mUnited Airlines

Deal found 17/4£614

Mon 11/806:00PWM - LHR

2 stops21h 35mAir Canada

Mon 22/914:05LHR - PWM

2 stops28h 44mAir Canada

Deal found 17/4£619

Sun 1/606:35PWM - LHR

2 stops28h 25mScandinavian Airlines

Sun 8/619:50LHR - PWM

2 stops33h 56mScandinavian Airlines

Deal found 17/4£627

Mon 11/810:51PWM - LHR

3 stops16h 44mMultiple Airlines

Mon 22/914:05LHR - PWM

2 stops13h 56mMultiple Airlines

Deal found 17/4£637

Sat 19/405:32PWM - LHR

1 stop9h 28mDelta

Mon 21/406:30LHR - PWM

2 stops21h 44mDelta

Deal found 17/4£791

Fri 27/606:10PWM - LHR

2 stops29h 30mTurkish Airlines

Sun 13/722:25LHR - PWM

2 stops30h 12mTurkish Airlines

Deal found 17/4£921

Thu 5/614:30PWM - LHR

1 stop13h 20mKLM

Sat 14/609:20LHR - PWM

1 stop17h 17mKLM

Deal found 17/4£930

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 18 April 2025.

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Sun 4/508:15LHR - PWM

1 stop11h 10mJetBlue

Deal found 16/4£461

Mon 11/818:20PWM - LHR

1 stop12h 25mUnited Airlines

Mon 22/914:05LHR - PWM

2 stops25h 43mUnited Airlines

Deal found 17/4£614

Mon 11/806:00PWM - LHR

2 stops21h 35mAir Canada

Mon 22/914:05LHR - PWM

2 stops28h 44mAir Canada

Deal found 17/4£619

Sun 1/606:35PWM - LHR

2 stops28h 25mScandinavian Airlines

Sun 8/619:50LHR - PWM

2 stops33h 56mScandinavian Airlines

Deal found 17/4£627

Mon 11/810:51PWM - LHR

3 stops16h 44mMultiple Airlines

Mon 22/914:05LHR - PWM

2 stops13h 56mMultiple Airlines

Deal found 17/4£637

Tue 29/406:35PWM - LHR

2 stops29h 05mTurkish Airlines

Sun 4/506:30LHR - PWM

2 stops21h 49mTurkish Airlines

Deal found 16/4£735

Tue 29/413:00PWM - LHR

1 stop14h 55mDelta

Sun 4/508:40LHR - PWM

2 stops19h 34mDelta

Deal found 16/4£753

Sun 29/611:21PWM - LHR

1 stop14h 54mAustrian Airlines

Sat 5/719:30LHR - PWM

2 stops27h 56mAustrian Airlines

Deal found 16/4£1,301

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 18 April 2025 and is based on user searches.

Sun 20/414:59PWM - LHR

2 stops21h 41mScandinavian Airlines

Sat 26/414:20LHR - PWM

2 stops39h 22mScandinavian Airlines

Deal found 15/4£1,476

Sun 20/406:15PWM - LHR

1 stop18h 40mAustrian Airlines

Sun 27/415:20LHR - PWM

1 stop13h 11mAustrian Airlines

Deal found 15/4£1,577

Tue 22/414:31PWM - LHR

1 stop11h 24mUnited Airlines

Tue 29/408:45LHR - PWM

2 stops19h 42mUnited Airlines

Deal found 15/4£523

Tue 22/405:20PWM - LHR

1 stop27h 10mDelta

Sun 27/409:00LHR - PWM

2 stops20h 42mDelta

Deal found 15/4£572

Tue 22/406:15PWM - LHR

2 stops22h 45mAir Canada

Mon 28/408:30LHR - PWM

2 stops19h 57mAir Canada

Deal found 15/4£654

Wed 23/417:35PWM - LHR

1 stop10h 55mJetBlue

Mon 28/408:15LHR - PWM

1 stop13h 25mJetBlue

Deal found 15/4£540

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Sun 4/508:15LHR - PWM

1 stop11h 10mJetBlue

Deal found 16/4£461

Tue 29/406:35PWM - LHR

2 stops29h 05mTurkish Airlines

Sun 4/506:30LHR - PWM

2 stops21h 49mTurkish Airlines

Deal found 16/4£735

Tue 29/406:15PWM - LHR

3 stops19h 15mMultiple Airlines

Sun 4/514:05LHR - PWM

2 stops14h 54mMultiple Airlines

Deal found 16/4£768

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 18 April 2025.

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Deal found 17/4£279

Tue 29/412:45PWM - LHR

2 stops13h 30mLufthansa

Deal found 17/4£423

Sun 1/612:35PWM - LHR

3 stops42h 30mMultiple Airlines

Deal found 17/4£526

Sun 1/606:35PWM - LHR

2 stops28h 25mScandinavian Airlines

Deal found 17/4£530

Wed 18/606:10PWM - LHR

2 stops19h 20mAir Canada

Deal found 16/4£625

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

Tue 29/4

17:35-09:30

1 stop10h 55m

London Heathrow

Sun 4/5

08:15-14:25

1 stop11h 10m

£461

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/8

18:20-11:45

1 stop12h 25m

London Heathrow

Mon 22/9

14:05-10:48

2 stops25h 43m

£614

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/8

06:00-08:35

2 stops21h 35m

London Heathrow

Mon 22/9

14:05-13:49

2 stops28h 44m

£619

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 1/6

06:35-16:00

2 stops28h 25m

London Heathrow

Sun 8/6

19:50-00:46

2 stops33h 56m

£627

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/8

10:51-08:35

3 stops16h 44m

London Heathrow

Mon 22/9

14:05-23:01

2 stops13h 56m

£637

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

06:35-16:40

2 stops29h 05m

London Heathrow

Sun 4/5

06:30-23:19

2 stops21h 49m

£735

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

13:00-08:55

1 stop14h 55m

London Heathrow

Sun 4/5

08:40-23:14

2 stops19h 34m

£753

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 29/6

11:21-07:15

1 stop14h 54m

London Heathrow

Sat 5/7

19:30-18:26

2 stops27h 56m

£1,301

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

17:35-09:30

1 stop10h 55m

£279

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

12:45-07:15

2 stops13h 30m

£423

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 13 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

See what other customers who have flown with Delta, Austrian Airlines and United Airlines from Portland to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,916 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

7,916 reviews

Delta

8.0

Very Good

7,916 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

775 reviews

Delta

8.0

Very Good

7,916 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

8,667 reviews

Delta

8.0

Very Good

7,916 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

2,926 reviews

Delta

8.0

Very Good

7,916 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

3,769 reviews

Delta

8.0

Very Good

7,916 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 £461. Additional return tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at £614 and £619, respectively. Users have found that JetBlue is 37% 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?
£279 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Lufthansa and Scandinavian Airlines, with prices starting from £423 and £530, 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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Gatwick

Luton

Slough

Croydon

Eastbourne

Wembley

Northampton

Hayes

Crawley

Southend-on-Sea

Maidstone

Swindon

Ipswich

Southall

Ilford

Winchester

Folkestone

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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 £279

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 29/4. 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 18 April 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 18 April 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

See what other customers who have flown with Delta, Austrian Airlines and United Airlines from Portland to London have to say. 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?

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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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 18 April 2025.