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

Scandinavian Airlines and JetBlue can get you from London Heathrow Airport to Portland, Maine in just under 20h 38m. Your travel time can differ by up to 2h 03m. The distance from London Heathrow Airport to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Portland, Maine ranges from 73.0 - 115.0 inches per month. November is typically the wettest month, when rainfall can reach 115.0 mm. August is typically the driest time to visit Portland, Maine when rainfall is around 73.0 mm.

If weather is an important factor for your trip to Portland, Maine, 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 20.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What is the cheapest time of day to fly from LHR to PWM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Portland, Maine as you normally would.

What airport do you fly into for flights to Portland from London Heathrow?

Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from London Heathrow. Booking flights from London Heathrow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

Can I find deals for flights from Heathrow to Portland that include hotel bookings?

Yes. In addition to deals on Heathrow to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Portland.

Can I find deals for business class flights from Heathrow to Portland?

Yes. Cheapflights offers flight deals from Heathrow to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£396+ Cheap Flights from London Heathrow Airport to Portland, Maine

Cheap flight deals from Heathrow to Portland

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Heathrow to Portland
Explore the most affordable flight options available from Heathrow to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 September 2026.

Sun 1/1107:45 -

1 stop20h 58m

Tue 10/1106:30 -

1 stop10h 10m

Deal found 24/9£573

Thu 5/1107:25 -

1 stop21h 18m

Thu 12/1106:30 -

1 stop10h 10m

Deal found 21/9£578

Tue 10/1107:25 -

1 stop21h 18m

Tue 17/1106:30 -

1 stop10h 10m

Deal found 20/9£590

Thu 3/1206:40 -

2 stops22h 41m

Sun 6/1206:00 -

2 stops31h 30m

Deal found 23/9£599

Fri 6/1108:05 -

1 stop20h 38m

Fri 13/1106:30 -

1 stop22h 00m

Deal found 22/9£602

Sat 7/1112:20 -

1 stop16h 23m

Sat 14/1106:30 -

1 stop10h 10m

Deal found 23/9£605

Tue 10/1107:25 -

1 stop21h 18m

Sat 14/1106:30 -

1 stop10h 10m

Deal found 20/9£615

Fri 16/1008:15 -

1 stop20h 39m

Sun 25/1006:30 -

1 stop10h 25m

Deal found 23/9£637

Thu 5/1112:20 -

1 stop16h 23m

Thu 12/1108:49 -

2 stops17h 21m

Deal found 21/9£642

Tue 10/1112:20 -

1 stop16h 23m

Tue 17/1108:49 -

2 stops17h 21m

Deal found 20/9£661

Find flight deals from Heathrow to Portland

Round-trip from	£573
One-way from	£396
Popular in	September
Cheapest in	November
Average price	£1,591

JetBlue
1/11-10/11
2 total stops
31h 08m total
London to Portland

Search Deals

30/11-31/12
2 total stops
41h 33m total
London to Portland

Search Deals

Highest demand for flights based on searches. 26% potential increase in price (£210 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 12% potential price decrease (£63 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 20/10

18:45-23:54

2 stops34h 09m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£469

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 30/11

15:40-11:56

1 stop25h 16m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£517

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

15:40-11:56

1 stop25h 16m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£549

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 29/11

20:45-16:24

3 stops48h 39m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£549

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

17:50-15:16

2 stops26h 26m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£550

Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 13/12

15:40-11:53

1 stop25h 13m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£567

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

06:40-00:21

2 stops22h 41m

Portland

Sun 6/12

06:00-18:30

2 stops31h 30m

£599

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 6/11

08:05-23:43

1 stop20h 38m

Portland

Fri 13/11

06:30-09:30

1 stop22h 00m

£602

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 7/11

12:20-23:43

1 stop16h 23m

Portland

Sat 14/11

16:50-13:45

2 stops15h 55m

£677

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 5/11

12:25-23:43

2 stops16h 18m

Portland

Thu 12/11

08:49-07:10

2 stops17h 21m

£711

Flights are sorted by cheapest return flights first.

Deals found on 20/9

Showing 1-10 of 15 resultsSorted by cheapest first

Best time to book a flight from Heathrow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Heathrow with our price prediction graph.

LHR-PWM

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 London Heathrow Airport to Portland

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

Atlanta (ATL) – chosen by Cheapflights users on 67% of one-stop itineraries from London Heathrow Airport to Portland, Maine on Cheapflights.

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

Newark (EWR) is the most affordable one-stop option, with an average return flight price of £551.

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

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 10h 53m.

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

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 17m.

Related info for your journey

What airport do you fly into for flights to Portland from London Heathrow?
Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from London Heathrow. Booking flights from London Heathrow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.
How long is the flight from London Heathrow Airport to Portland, Maine?
Scandinavian Airlines and JetBlue can get you from London Heathrow Airport to Portland, Maine in just under 20h 38m. Your travel time can differ by up to 2h 03m. The distance from London Heathrow Airport to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.
Can I find deals for flights from Heathrow to Portland that include hotel bookings?
Yes. In addition to deals on Heathrow to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Portland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Portland.
Can I find deals for business class flights from Heathrow to Portland?
Yes. Cheapflights offers flight deals from Heathrow to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Other flights from Heathrow

Popular flights

Alternative routes for Heathrow to Portland

Heathrow to Boston flights

Gatwick to Boston flights

London City to Boston flights

Stansted to Boston flights

Luton to Boston flights

Heathrow to Bangor flights

Southend to Boston flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Portland?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Portland from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Portland?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Portland from Heathrow.

Can Cheapflights find flights from Heathrow to Portland with no change fees?

Certainly. Search results for flights to Portland from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Portland become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Portland on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Portland, Maine from £396

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Portland

Cheapest flights from Heathrow to PortlandExplore the most affordable flight options available from Heathrow to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 September 2026.

Explore the most affordable flight options available from Heathrow to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 September 2026.

Best flights from Heathrow to PortlandDiscover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 September 2026.

Discover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 September 2026.

Last-minute flights from Heathrow to PortlandDiscover last-minute flight deals from Heathrow to Portland. Data last updated 25 September 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Portland. Data last updated 25 September 2026 and is based on user searches.

One-way flights from Heathrow to PortlandSearch for one-way flight options from Heathrow to Portland. Find affordable one-way fares based on user searches. Data last updated 25 September 2026.

Search for one-way flight options from Heathrow to Portland. Find affordable one-way fares based on user searches. Data last updated 25 September 2026.

Find flight deals from Heathrow to Portland

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Portland that are best for you.

Best time to book a flight from Heathrow to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Heathrow with our price prediction graph.

Cheapflights Insights

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

Atlanta (ATL) – chosen by Cheapflights users on 67% of one-stop itineraries from London Heathrow Airport to Portland, Maine on Cheapflights.

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

Newark (EWR) is the most affordable one-stop option, with an average return flight price of £551.

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

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 10h 53m.

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

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 17m.

Related info for your journey

What airport do you fly into for flights to Portland from London Heathrow?

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

Can I find deals for flights from Heathrow to Portland that include hotel bookings?

How can I find direct flights from Heathrow to Portland?

Can I find deals for business class flights from Heathrow to 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 Heathrow to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Portland by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Heathrow to Portland by cabin class

Find flights from Heathrow to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Portland flights

Browse other Heathrow and Portland flight options. Last updated on 25 September 2026.

Other flights from Heathrow

Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 25 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Portland?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Portland?

Can Cheapflights find flights from Heathrow to Portland with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Portland become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Heathrow to Portland
Explore the most affordable flight options available from Heathrow to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 September 2026.

Best flights from Heathrow to Portland
Discover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 September 2026.

Last-minute flights from Heathrow to Portland
Discover last-minute flight deals from Heathrow to Portland. Data last updated 25 September 2026 and is based on user searches.

One-way flights from Heathrow to Portland
Search for one-way flight options from Heathrow to Portland. Find affordable one-way fares based on user searches. Data last updated 25 September 2026.