What’s the cheapest stopover airport for flights from Portland, Maine to London Heathrow Airport?

New York (JFK) is the most affordable one-stop option, with an average return flight price of £541.

What’s the fastest stopover option from Portland, Maine to London Heathrow Airport?

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 9h 40m.

Which airport typically offers the quickest stopover for flights from Portland, Maine to London Heathrow Airport?

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 35m.

What’s the top stopover airport for flights from Portland, Maine to London Heathrow Airport?

Newark (EWR) – chosen by Cheapflights users on 40% of one-stop itineraries from Portland, Maine to London Heathrow Airport on Cheapflights.

How long is the flight from Portland, Maine to London Heathrow Airport?

For as low as £392, Delta can have you in London Heathrow Airport from Portland, Maine in 11h 57m. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi. This flight may include one or multiple stops.

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.

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).

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 July. Prices are generally better when you fly from Portland, Maine to London Heathrow Airport in October, with the cheapest ticket starting at £445.

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.

£257+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£361
One-way from	£257
Popular in	June
Cheapest in	May
Average price	£723

Virgin Atlantic
28/10-4/11
3 total stops
31h 22m total
Portland to London

Search Deals

JetBlue
22/9
1 total stop
14h 13m total
Portland to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£85 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 September 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 15 September 2025.

Tue 28/1013:27PWM - LHR

1 stop12h 58mVirgin Atlantic

Tue 4/1108:55LHR - PWM

2 stops18h 24mVirgin Atlantic

Deal found 13/9£361

Tue 28/1013:27PWM - LHR

1 stop15h 33mDelta

Tue 4/1108:55LHR - PWM

2 stops20h 10mDelta

Deal found 13/9£386

Wed 15/1014:38PWM - LHR

1 stop15h 47mDelta

Fri 24/1006:30LHR - PWM

2 stops22h 35mDelta

Deal found 14/9£387

Tue 28/1016:48PWM - LHR

1 stop11h 57mKLM

Tue 4/1116:10LHR - PWM

1 stop12h 55mKLM

Deal found 13/9£392

Fri 7/1113:27PWM - LHR

1 stop13h 23mVirgin Atlantic

Wed 19/1112:30LHR - PWM

1 stop14h 49mVirgin Atlantic

Deal found 13/9£427

Mon 29/914:41PWM - LHR

1 stop10h 44mDelta

Mon 6/1009:00LHR - PWM

2 stops20h 05mDelta

Deal found 13/9£453

Fri 10/1014:38PWM - LHR

1 stop13h 37mDelta

Tue 14/1009:55LHR - PWM

2 stops17h 24mDelta

Deal found 13/9£453

Mon 29/914:41PWM - LHR

1 stop13h 09mKLM

Mon 6/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 13/9£459

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 15 September 2025.

Wed 15/1014:38PWM - LHR

1 stop15h 47mDelta

Fri 24/1006:30LHR - PWM

2 stops22h 35mDelta

Deal found 14/9£387

Tue 28/1016:48PWM - LHR

1 stop11h 57mKLM

Tue 4/1116:10LHR - PWM

1 stop12h 55mKLM

Deal found 13/9£392

Tue 28/1012:45PWM - LHR

2 stops14h 10mDelta

Tue 4/1109:00LHR - PWM

2 stops20h 05mDelta

Deal found 13/9£389

Wed 29/1013:27PWM - LHR

1 stop14h 23mKLM

Wed 5/1108:55LHR - PWM

1 stop18h 24mKLM

Deal found 14/9£392

Mon 13/1014:38PWM - LHR

1 stop14h 37mDelta

Mon 20/1008:40LHR - PWM

2 stops20h 25mDelta

Deal found 13/9£453

Mon 29/914:41PWM - LHR

1 stop13h 09mKLM

Mon 6/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 13/9£459

Mon 29/914:41PWM - LHR

2 stops15h 04mDelta

Mon 6/1009:00LHR - PWM

2 stops20h 05mDelta

Deal found 13/9£476

Wed 15/1014:38PWM - LHR

1 stop13h 12mKLM

Fri 24/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 14/9£497

Fri 7/1114:38PWM - LHR

2 stops14h 47mDelta

Wed 19/1108:55LHR - PWM

2 stops19h 59mDelta

Deal found 13/9£476

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 15 September 2025 and is based on user searches.

Mon 29/914:41PWM - LHR

1 stop10h 44mDelta

Mon 6/1009:00LHR - PWM

2 stops20h 05mDelta

Deal found 13/9£453

Mon 29/914:41PWM - LHR

1 stop13h 09mKLM

Mon 6/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 13/9£459

Fri 10/1014:38PWM - LHR

1 stop13h 37mDelta

Tue 14/1009:55LHR - PWM

2 stops17h 24mDelta

Deal found 13/9£453

Mon 13/1014:38PWM - LHR

2 stops15h 07mDelta

Mon 20/1008:40LHR - PWM

2 stops20h 25mDelta

Deal found 13/9£477

Wed 15/1014:38PWM - LHR

1 stop15h 47mDelta

Fri 24/1006:30LHR - PWM

2 stops22h 35mDelta

Deal found 14/9£387

Tue 28/1013:27PWM - LHR

1 stop12h 58mVirgin Atlantic

Tue 4/1108:55LHR - PWM

2 stops18h 24mVirgin Atlantic

Deal found 13/9£361

Tue 28/1013:27PWM - LHR

1 stop15h 33mDelta

Tue 4/1108:55LHR - PWM

2 stops20h 10mDelta

Deal found 13/9£386

Tue 28/1016:48PWM - LHR

1 stop11h 57mKLM

Tue 4/1116:10LHR - PWM

1 stop12h 55mKLM

Deal found 13/9£392

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 15 September 2025.

Mon 22/914:17PWM - LHR

1 stop14h 13mJetBlue

Deal found 13/9£257

Sat 1/1118:18PWM - LHR

3 stops48h 22mMultiple Airlines

Deal found 14/9£282

Sat 8/1111:21PWM - LHR

3 stops44h 19mMultiple Airlines

Deal found 14/9£293

Mon 13/1007:09PWM - LHR

1 stop21h 21mJetBlue

Deal found 13/9£318

Sat 8/1106:00PWM - LHR

2 stops33h 35mAir Canada

Deal found 14/9£335

Mon 13/1009:46PWM - LHR

3 stops50h 59mMultiple Airlines

Deal found 13/9£338

Mon 22/912:40PWM - LHR

2 stops15h 35mDelta

Deal found 13/9£338

Sat 8/1114:38PWM - LHR

1 stop24h 32mDelta

Deal found 14/9£350

Sat 1/1119:44PWM - LHR

2 stops44h 51mAir Canada

Deal found 14/9£354

Sat 1/1116:51PWM - LHR

1 stop33h 04mUnited Airlines

Deal found 14/9£421

Mon 22/909:46PWM - LHR

3 stops45h 09mMultiple Airlines

Deal found 13/9£454

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

Wed 15/10

14:38-11:25

1 stop15h 47m

London Heathrow

Fri 24/10

06:30-00:05

2 stops22h 35m

£387

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 28/10

12:45-06:55

2 stops14h 10m

London Heathrow

Tue 4/11

09:00-00:05

2 stops20h 05m

£389

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 28/10

16:48-08:45

1 stop11h 57m

London Heathrow

Tue 4/11

16:10-00:05

1 stop12h 55m

£392

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 29/10

13:27-07:50

1 stop14h 23m

London Heathrow

Wed 5/11

08:55-22:19

1 stop18h 24m

£392

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 13/10

14:38-10:15

1 stop14h 37m

London Heathrow

Mon 20/10

08:40-00:05

2 stops20h 25m

£453

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 29/9

14:41-08:50

1 stop13h 09m

London Heathrow

Mon 6/10

16:05-00:05

1 stop13h 00m

£459

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 29/9

14:41-10:45

2 stops15h 04m

London Heathrow

Mon 6/10

09:00-00:05

2 stops20h 05m

£476

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 7/11

14:38-10:25

2 stops14h 47m

London Heathrow

Wed 19/11

08:55-23:54

2 stops19h 59m

£476

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 15/10

14:38-08:50

1 stop13h 12m

London Heathrow

Fri 24/10

16:05-00:05

1 stop13h 00m

£497

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 22/9

14:17-09:30

1 stop14h 13m

£257

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 21 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

Prices

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.

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.
How long is the flight from Portland, Maine to London Heathrow Airport?
For as low as £392, Delta can have you in London Heathrow Airport from Portland, Maine in 11h 57m. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi. This flight may include one or multiple stops.
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.

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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 £257

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 22/9. 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

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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 15 September 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 15 September 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?

What’s the top stopover airport for flights from Portland, Maine to London Heathrow Airport?

What’s the fastest stopover option from Portland, Maine to London Heathrow Airport?

What’s the fastest stopover option from Portland, Maine to London Heathrow Airport?

Which airport typically offers the quickest stopover for flights from Portland, Maine to London Heathrow Airport?

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?

How long is the flight from Portland, Maine to London Heathrow Airport?

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 London Heathrow Airport?

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Alternative routes for Portland to Heathrow

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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 15 September 2025.