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

There are many flights that can get you from London Heathrow Airport to Portland, Maine in 16h 16m. Fly via Scandinavian Airlines or United Airlines to get the fastest option. The distance between London Heathrow Airport and Portland, Maine is about 3173 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

In terms of precipitation, rainfall in Portland, Maine ranges from 2.9 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. August is typically the driest time to visit Portland, Maine when rainfall is around 2.9 in.

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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 vacation 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.

$943+ Cheap Flights from London Heathrow Airport to Portland, ME

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Cheap flight deals from Heathrow to Portland

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 October 27, 2026.

Thu 11/1212:20 pm -

1 stop16h 23m

Mon 11/166:30 am -

1 stop10h 10m

Deal found 10/25

$943

Wed 12/26:40 am -

2 stops22h 41m

Sun 12/66:00 am -

2 stops30h 40m

Deal found 10/23

$995

Wed 12/29:00 am -

2 stops19h 24m

Sun 12/67:55 pm -

1 stop19h 40m

Deal found 10/21

$1,021

Tue 12/89:30 am -

2 stops14h 42m

Tue 12/153:20 pm -

2 stops14h 30m

Deal found 10/24

$1,028

Thu 11/126:25 am -

2 stops22h 18m

Mon 11/166:30 am -

2 stops28h 50m

Deal found 10/25

$1,047

Thu 11/1212:40 pm -

1 stop15h 51m

Mon 11/166:00 am -

2 stops20h 45m

Deal found 10/25

$1,053

Sun 12/65:30 pm -

2 stops30h 42m

Sun 12/137:55 pm -

1 stop20h 25m

Deal found 10/22

$1,058

Tue 12/812:00 pm -

1 stop12h 25m

Tue 12/159:12 am -

1 stop18h 58m

Deal found 10/24

$1,060

Mon 11/2312:50 pm -

1 stop15h 31m

Mon 11/305:08 pm -

1 stop13h 52m

Deal found 10/26

$1,061

Best flights from Heathrow to Portland
Discover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.

Wed 12/26:40 am -

2 stops22h 41m

Sun 12/66:00 am -

2 stops30h 40m

Deal found 10/23

$995

Mon 11/2312:05 pm -

2 stops16h 16m

Mon 11/303:41 pm -

2 stops14h 09m

Deal found 10/26

$1,021

Tue 12/86:00 am -

2 stops18h 25m

Tue 12/159:12 am -

1 stop16h 08m

Deal found 10/24

$1,022

Fri 1/811:15 am -

1 stop11h 51m

Mon 1/116:36 pm -

2 stops33h 29m

Deal found 10/26

$1,089

Wed 12/912:05 pm -

2 stops16h 19m

Wed 12/169:38 am -

2 stops15h 17m

Deal found 10/25

$1,021

Wed 12/212:05 pm -

2 stops16h 19m

Sun 12/64:47 pm -

1 stop32h 08m

Deal found 10/22

$1,022

Sat 11/2112:05 pm -

2 stops16h 16m

Sat 11/288:45 am -

1 stop16h 10m

Deal found 10/24

$1,101

Last-minute flights from Heathrow to Portland
Discover last-minute flight deals from Heathrow to Portland. Data last updated October 27, 2026 and is based on user searches.

Thu 11/1212:20 pm -

1 stop16h 23m

Mon 11/166:30 am -

1 stop10h 10m

Deal found 10/25

$943

Thu 11/126:25 am -

2 stops22h 18m

Mon 11/166:30 am -

2 stops28h 50m

Deal found 10/25

$1,047

Thu 11/1212:40 pm -

1 stop15h 51m

Mon 11/166:00 am -

2 stops20h 45m

Deal found 10/25

$1,053

Thu 11/126:00 am -

3 stops22h 21m

Mon 11/168:49 am -

3 stops17h 21m

Deal found 10/25

$1,151

Thu 11/1211:10 am -

2 stops17h 11m

Mon 11/168:49 am -

3 stops17h 21m

Deal found 10/25

$1,191

Sat 11/2112:05 pm -

2 stops16h 16m

Sat 11/282:05 pm -

2 stops16h 10m

Deal found 10/24

$1,098

Mon 11/2312:05 pm -

2 stops16h 16m

Mon 11/302:05 pm -

1 stop15h 45m

Deal found 10/26

$1,021

Sun 11/296:50 am -

2 stops21h 31m

Sat 12/197:44 pm -

1 stop20h 36m

Deal found 10/23

$1,314

Sun 11/299:00 am -

2 stops53h 03m

Sat 12/193:38 pm -

2 stops48h 22m

Deal found 10/26

$1,389

Find flight deals from Heathrow to Portland

Round-trip from	$943 (JetBlue)
Popular in	August
Cheapest in	April
Average price	$1,261

From London Heathrow to Portland

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($119 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 round-trip

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 12/2

6:40 am-12:21 am

2 stops22h 41m

Portland

Sun 12/6

6:00 am-5:40 pm

2 stops30h 40m

$995

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 11/23

12:05 pm-11:21 pm

2 stops16h 16m

Portland

Mon 11/30

3:41 pm-10:50 am

2 stops14h 09m

$1,021

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 12/9

12:05 pm-11:24 pm

2 stops16h 19m

Portland

Wed 12/16

9:38 am-5:55 am

2 stops15h 17m

$1,021

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 12/8

6:00 am-7:25 pm

2 stops18h 25m

Portland

Tue 12/15

9:12 am-6:20 am

1 stop16h 08m

$1,022

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 12/2

12:05 pm-11:24 pm

2 stops16h 19m

Portland

Sun 12/6

4:47 pm-5:55 am

1 stop32h 08m

$1,022

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 1/8

11:15 am-6:06 pm

1 stop11h 51m

Portland

Mon 1/11

6:36 pm-9:05 am

2 stops33h 29m

$1,089

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 11/21

12:05 pm-11:21 pm

2 stops16h 16m

Portland

Sat 11/28

8:45 am-5:55 am

1 stop16h 10m

$1,101

Quickest round-trip

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 1/17

12:15 pm-9:45 pm

2 stops14h 30m

Portland

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$2,631

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/24

Sorted 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 round-trip 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 is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of $729). Flying from London Heathrow Airport to Portland, Maine in August is currently the most expensive (average of $1,306). 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 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?
There are many flights that can get you from London Heathrow Airport to Portland, Maine in 16h 16m. Fly via Scandinavian Airlines or United Airlines to get the fastest option. The distance between London Heathrow Airport and Portland, Maine is about 3173 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with 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 vacation 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.
What is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?
Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of $729). Flying from London Heathrow Airport to Portland, Maine in August is currently the most expensive (average of $1,306). 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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Brunswick

Conway

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$943+ Cheap flights from Heathrow (LHR) to Portland, ME (PWM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Heathrow to Portland with Cheapflights

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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 October 27, 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 October 27, 2026.

Best flights from Heathrow to PortlandDiscover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.

Discover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.

Last-minute flights from Heathrow to PortlandDiscover last-minute flight deals from Heathrow to Portland. Data last updated October 27, 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Portland. Data last updated October 27, 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 October 27, 2026.

Search for one-way flight options from Heathrow to Portland. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.

Find flight deals from Heathrow to Portland

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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 is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?

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?

What is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?

Traveling to a place near Portland?

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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 October 27, 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 October 27, 2026.

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Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 27, 2026.

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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 October 27, 2026.

Best flights from Heathrow to Portland
Discover carefully curated flight deals from Heathrow to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.

Last-minute flights from Heathrow to Portland
Discover last-minute flight deals from Heathrow to Portland. Data last updated October 27, 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 October 27, 2026.