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 £536. Additional return tickets that might be worth considering are offered by United Airlines and KLM, with the lowest prices starting at £547 and £559, respectively. Users have found that JetBlue is 32% 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?

£336 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 United Airlines, with prices starting from £388 and £393, 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 February, with the cheapest ticket starting at £489.

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.

£336+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£536
One-way from	£336
Popular in	June
Cheapest in	January
Average price	£634

JetBlue
21/4-29/4
2 total stops
24h 20m total
Portland to London

Search Deals

JetBlue
20/4
1 total stop
10h 55m total
Portland to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£151 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 February 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 5 February 2025.

Mon 21/417:35PWM - LHR

1 stop10h 55mJetBlue

Tue 29/408:15LHR - PWM

1 stop13h 25mJetBlue

Deal found 4/2£536

Wed 5/314:29PWM - LHR

2 stops14h 01mAmerican Airlines

Wed 12/309:50LHR - PWM

2 stops17h 07mAmerican Airlines

Deal found 3/2£600

Wed 5/312:15PWM - LHR

1 stop12h 40mUnited Airlines

Wed 12/308:45LHR - PWM

2 stops18h 30mUnited Airlines

Deal found 3/2£609

Wed 5/315:04PWM - LHR

1 stop11h 51mKLM

Wed 12/314:30LHR - PWM

1 stop13h 28mKLM

Deal found 3/2£621

Wed 5/312:15PWM - LHR

3 stops18h 35mMultiple Airlines

Wed 12/309:00LHR - PWM

2 stops18h 15mMultiple Airlines

Deal found 3/2£626

Wed 5/312:15PWM - LHR

3 stops18h 35mAir Canada

Wed 12/309:00LHR - PWM

3 stops18h 15mAir Canada

Deal found 3/2£631

Sun 20/411:40PWM - LHR

1 stop13h 45mDelta

Tue 29/409:55LHR - PWM

2 stops19h 45mDelta

Deal found 4/2£657

Sat 1/315:04PWM - LHR

2 stops13h 16mScandinavian Airlines

Tue 4/317:00LHR - PWM

2 stops35h 57mScandinavian Airlines

Deal found 4/2£731

Wed 12/311:20PWM - LHR

1 stop18h 55mAustrian Airlines

Mon 17/312:05LHR - PWM

2 stops34h 34mAustrian Airlines

Deal found 4/2£1,319

Sun 20/405:20PWM - LHR

1 stop20h 55mVirgin Atlantic

Sat 26/409:35LHR - PWM

2 stops18h 34mVirgin Atlantic

Deal found 4/2£1,390

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 5 February 2025.

Mon 21/417:35PWM - LHR

1 stop10h 55mJetBlue

Tue 29/408:15LHR - PWM

1 stop13h 25mJetBlue

Deal found 4/2£536

Wed 19/315:55PWM - LHR

1 stop10h 25mUnited Airlines

Wed 26/314:30LHR - PWM

2 stops28h 22mUnited Airlines

Deal found 5/2£547

Wed 19/315:00PWM - LHR

1 stop16h 10mKLM

Wed 26/314:30LHR - PWM

1 stop13h 28mKLM

Deal found 5/2£559

Wed 19/306:10PWM - LHR

3 stops20h 20mAir Canada

Wed 26/309:00LHR - PWM

3 stops18h 15mAir Canada

Deal found 5/2£570

Wed 5/314:29PWM - LHR

2 stops14h 01mAmerican Airlines

Wed 12/309:50LHR - PWM

2 stops17h 07mAmerican Airlines

Deal found 3/2£600

Wed 5/312:15PWM - LHR

3 stops18h 35mMultiple Airlines

Wed 12/309:00LHR - PWM

2 stops18h 15mMultiple Airlines

Deal found 3/2£626

Sun 20/411:40PWM - LHR

1 stop13h 45mDelta

Tue 29/409:55LHR - PWM

2 stops19h 45mDelta

Deal found 4/2£657

Sat 1/315:04PWM - LHR

2 stops13h 16mScandinavian Airlines

Tue 4/317:00LHR - PWM

2 stops35h 57mScandinavian Airlines

Deal found 4/2£731

Wed 12/311:20PWM - LHR

1 stop18h 55mAustrian Airlines

Mon 17/312:05LHR - PWM

2 stops34h 34mAustrian Airlines

Deal found 4/2£1,319

Sun 20/405:20PWM - LHR

1 stop20h 55mVirgin Atlantic

Sat 26/409:35LHR - PWM

2 stops18h 34mVirgin Atlantic

Deal found 4/2£1,390

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 5 February 2025 and is based on user searches.

Sat 1/315:04PWM - LHR

2 stops13h 16mScandinavian Airlines

Tue 4/317:00LHR - PWM

2 stops35h 57mScandinavian Airlines

Deal found 4/2£731

Sat 1/305:27PWM - LHR

1 stop9h 43mDelta

Tue 4/310:00LHR - PWM

2 stops18h 57mDelta

Deal found 4/2£761

Wed 5/314:29PWM - LHR

2 stops14h 01mAmerican Airlines

Wed 12/309:50LHR - PWM

2 stops17h 07mAmerican Airlines

Deal found 3/2£600

Wed 5/312:15PWM - LHR

1 stop12h 40mUnited Airlines

Wed 12/308:45LHR - PWM

2 stops18h 30mUnited Airlines

Deal found 3/2£609

Wed 5/315:04PWM - LHR

1 stop11h 51mKLM

Wed 12/314:30LHR - PWM

1 stop13h 28mKLM

Deal found 3/2£621

Wed 5/312:15PWM - LHR

3 stops18h 35mMultiple Airlines

Wed 12/309:00LHR - PWM

2 stops18h 15mMultiple Airlines

Deal found 3/2£626

Wed 5/312:15PWM - LHR

3 stops18h 35mAir Canada

Wed 12/309:00LHR - PWM

3 stops18h 15mAir Canada

Deal found 3/2£631

Wed 12/311:20PWM - LHR

1 stop18h 55mAustrian Airlines

Mon 17/312:05LHR - PWM

2 stops34h 34mAustrian Airlines

Deal found 4/2£1,319

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 5 February 2025.

Sun 20/417:35PWM - LHR

1 stop10h 55mJetBlue

Deal found 4/2£336

Sun 20/406:00PWM - LHR

2 stops19h 30mAir Canada

Deal found 4/2£388

Sat 19/418:42PWM - LHR

2 stops30h 38mUnited Airlines

Deal found 4/2£393

Wed 18/614:20PWM - LHR

2 stops20h 15mTAP AIR PORTUGAL

Deal found 4/2£493

Wed 18/618:55PWM - LHR

1 stop13h 35mVirgin Atlantic

Deal found 5/2£666

Sat 19/410:32PWM - LHR

3 stops24h 23mMultiple Airlines

Deal found 4/2£1,174

Find flights from Portland to Heathrow within your budget

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 21/4

17:35-09:30

1 stop10h 55m

London Heathrow

Tue 29/4

08:15-16:40

1 stop13h 25m

£536

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/3

14:29-09:30

2 stops14h 01m

London Heathrow

Wed 12/3

09:50-22:57

2 stops17h 07m

£600

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/3

12:15-05:55

1 stop12h 40m

London Heathrow

Wed 12/3

08:45-23:15

2 stops18h 30m

£609

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/3

15:04-07:55

1 stop11h 51m

London Heathrow

Wed 12/3

14:30-23:58

1 stop13h 28m

£621

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/3

12:15-11:50

3 stops18h 35m

London Heathrow

Wed 12/3

09:00-23:15

2 stops18h 15m

£626

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 5/3

12:15-11:50

3 stops18h 35m

London Heathrow

Wed 12/3

09:00-23:15

3 stops18h 15m

£631

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 20/4

11:40-06:25

1 stop13h 45m

London Heathrow

Tue 29/4

09:55-00:40

2 stops19h 45m

£657

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 1/3

15:04-09:20

2 stops13h 16m

London Heathrow

Tue 4/3

17:00-23:57

2 stops35h 57m

£731

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/3

11:20-10:15

1 stop18h 55m

London Heathrow

Mon 17/3

12:05-18:39

2 stops34h 34m

£1,319

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 20/4

05:20-07:15

1 stop20h 55m

London Heathrow

Sat 26/4

09:35-23:09

2 stops18h 34m

£1,390

Flights are sorted by cheapest return flights first.

Deals found on 4/2

Showing 1-10 of 15 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.

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, 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 £162). 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

8,406 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

8,406 reviews

Delta

8.0

Very Good

8,406 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

1,334 reviews

Delta

8.0

Very Good

8,406 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

785 reviews

Delta

8.0

Very Good

8,406 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.

Virgin Atlantic

7.5

Good

659 reviews

Delta

8.0

Very Good

8,406 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

7.4

Good

3,137 reviews

Delta

8.0

Very Good

8,406 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 £536. Additional return tickets that might be worth considering are offered by United Airlines and KLM, with the lowest prices starting at £547 and £559, respectively. Users have found that JetBlue is 32% 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?
£336 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 United Airlines, with prices starting from £388 and £393, 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 £162). 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

Milton Keynes

Croydon

Slough

Luton

Ilford

Hayes

Eastbourne

Northampton

Swindon

Southend-on-Sea

Wembley

Ipswich

Maidstone

Winchester

Crawley

Watford

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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 £336

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 20/4. 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 5 February 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 5 February 2025.

Find flights from Portland to Heathrow within your budget

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.

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?

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?

100% Free

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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 5 February 2025.