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 £538.

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 £384, Delta can have you in London Heathrow Airport from Portland, Maine in 13h 25m. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi.

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 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.

£384+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£384
Popular in	June
Cheapest in	May
Average price	£719

Virgin Atlantic
12/11-20/11
3 total stops
31h 44m total
Portland to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£84 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 17 September 2025.

Wed 12/1113:25PWM - LHR

1 stop13h 25mVirgin Atlantic

Thu 20/1109:00LHR - PWM

2 stops18h 19mVirgin Atlantic

Deal found 15/9£384

Tue 11/1106:00PWM - LHR

1 stop19h 25mDelta

Wed 19/1109:00LHR - PWM

2 stops19h 54mDelta

Deal found 17/9£385

Mon 10/1114:30PWM - LHR

1 stop12h 35mDelta

Tue 18/1110:00LHR - PWM

2 stops18h 54mDelta

Deal found 17/9£386

Wed 24/917:00PWM - LHR

2 stops15h 30mDelta

Tue 30/909:00LHR - PWM

2 stops20h 34mDelta

Deal found 15/9£387

Tue 11/1112:48PWM - LHR

2 stops15h 32mDelta

Thu 20/1111:45LHR - PWM

2 stops17h 09mDelta

Deal found 15/9£389

Tue 11/1116:53PWM - LHR

1 stop10h 52mKLM

Fri 21/1108:55LHR - PWM

1 stop18h 24mKLM

Deal found 15/9£390

Mon 10/1114:30PWM - LHR

1 stop10h 50mDelta

Thu 20/1114:30LHR - PWM

1 stop14h 24mDelta

Deal found 17/9£391

Wed 15/1014:38PWM - LHR

2 stops15h 07mDelta

Fri 24/1006:30LHR - PWM

2 stops22h 35mDelta

Deal found 14/9£408

Thu 30/1013:27PWM - LHR

1 stop12h 58mDelta

Thu 6/1106:20LHR - PWM

2 stops22h 45mDelta

Deal found 15/9£421

Fri 14/1113:25PWM - LHR

1 stop13h 25mDelta

Thu 20/1108:55LHR - PWM

2 stops18h 24mDelta

Deal found 17/9£422

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 17 September 2025.

Wed 12/1113:25PWM - LHR

1 stop13h 25mDelta

Wed 19/1111:30LHR - PWM

2 stops17h 24mDelta

Deal found 15/9£384

Wed 12/1113:25PWM - LHR

1 stop13h 25mVirgin Atlantic

Thu 20/1109:00LHR - PWM

2 stops18h 19mVirgin Atlantic

Deal found 15/9£384

Tue 11/1114:30PWM - LHR

1 stop14h 05mDelta

Wed 19/1108:55LHR - PWM

2 stops18h 24mDelta

Deal found 15/9£384

Tue 11/1106:00PWM - LHR

1 stop19h 25mDelta

Fri 21/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 17/9£385

Mon 10/1106:35PWM - LHR

1 stop22h 40mDelta

Wed 19/1109:00LHR - PWM

2 stops19h 54mDelta

Deal found 17/9£385

Mon 10/1114:30PWM - LHR

1 stop14h 45mDelta

Thu 20/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 17/9£385

Wed 12/1114:30PWM - LHR

1 stop12h 35mDelta

Fri 21/1111:45LHR - PWM

2 stops17h 09mDelta

Deal found 15/9£385

Mon 10/1114:30PWM - LHR

1 stop14h 45mDelta

Fri 21/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 17/9£385

Wed 15/1014:38PWM - LHR

1 stop15h 47mDelta

Fri 24/1006:30LHR - PWM

2 stops22h 35mDelta

Deal found 14/9£385

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 17 September 2025 and is based on user searches.

Wed 24/914:41PWM - LHR

1 stop14h 19mDelta

Tue 30/909:00LHR - PWM

2 stops20h 34mDelta

Deal found 15/9£384

Wed 24/913:35PWM - LHR

1 stop12h 10mKLM

Tue 30/916:05LHR - PWM

1 stop13h 29mKLM

Deal found 15/9£390

Wed 24/910:05PWM - LHR

2 stops15h 30mMultiple Airlines

Tue 30/908:30LHR - PWM

3 stops19h 43mMultiple Airlines

Deal found 15/9£762

Fri 26/913:35PWM - LHR

1 stop12h 10mKLM

Fri 10/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 16/9£427

Fri 26/912:40PWM - LHR

2 stops14h 00mDelta

Fri 10/1016:50LHR - PWM

1 stop12h 15mDelta

Deal found 16/9£450

Fri 26/907:09PWM - LHR

2 stops23h 36mTurkish Airlines

Fri 10/1019:05LHR - PWM

2 stops32h 59mTurkish Airlines

Deal found 16/9£730

Fri 26/908:00PWM - LHR

3 stops17h 30mAir Canada

Fri 10/1008:30LHR - PWM

3 stops19h 43mAir Canada

Deal found 16/9£999

Fri 26/914:41PWM - LHR

3 stops18h 54mScandinavian Airlines

Fri 10/1007:05LHR - PWM

2 stops22h 00mScandinavian Airlines

Deal found 16/9£1,890

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 12/11

13:25-07:50

1 stop13h 25m

London Heathrow

Wed 19/11

11:30-23:54

2 stops17h 24m

£384

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

13:25-07:50

1 stop13h 25m

London Heathrow

Thu 20/11

09:00-22:19

2 stops18h 19m

£384

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

14:30-09:35

1 stop14h 05m

London Heathrow

Wed 19/11

08:55-22:19

2 stops18h 24m

£384

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

06:00-06:25

1 stop19h 25m

London Heathrow

Fri 21/11

06:20-23:54

2 stops22h 34m

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 10/11

06:35-10:15

1 stop22h 40m

London Heathrow

Wed 19/11

09:00-23:54

2 stops19h 54m

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 10/11

14:30-10:15

1 stop14h 45m

London Heathrow

Thu 20/11

06:20-23:54

2 stops22h 34m

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

14:30-08:05

1 stop12h 35m

London Heathrow

Fri 21/11

11:45-23:54

2 stops17h 09m

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 10/11

14:30-10:15

1 stop14h 45m

London Heathrow

Fri 21/11

06:20-23:54

2 stops22h 34m

£385

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

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 21/11

06:00-21:20

1 stop10h 20m

£414

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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 £384, Delta can have you in London Heathrow Airport from Portland, Maine in 13h 25m. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi.
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 £384

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. 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

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 17 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 17 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 17 September 2025.