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Cheap flights from London Heathrow Airport to Portland from £417

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Portland departing on 15/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to Portland

Cheap return flights

JetBlue Logo
08:15 - 22:07LHR-PWM
18h 52m1 stop
JetBlue Logo
14:17 - 20:45PWM-LHR
25h 28m1 stop
£417JetBlue
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Mon, 15 Sep - Mon, 29 Sep
Icelandair Logo
08:15 - 22:07LHR-PWM
18h 52m1 stop
Icelandair Logo
07:09 - 06:30PWM-LHR
18h 21m2 stops
£459Icelandair
Find Deal
Mon, 15 Sep - Mon, 29 Sep
JetBlue Logo
08:15 - 00:17LHR-PWM
21h 02m1 stop
JetBlue Logo
06:05 - 20:45PWM-LHR
9h 40m1 stop
£482JetBlue
Find Deal
Fri, 29 Aug - Wed, 3 Sep
Virgin Atlantic Logo
12:45 - 00:11LHR-PWM
16h 26m2 stops
Virgin Atlantic Logo
06:00 - 06:20PWM-LHR
19h 20m2 stops
£508Virgin Atlantic
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Mon, 15 Sep - Mon, 29 Sep
Delta Logo
08:40 - 00:11LHR-PWM
20h 31m2 stops
Delta Logo
14:41 - 07:15PWM-LHR
11h 34m1 stop
£574Delta
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Sun, 14 Sep - Sun, 21 Sep
Finnair Logo
08:55 - 17:55LHR-PWM
14h 00m2 stops
Finnair Logo
13:09 - 07:50PWM-LHR
13h 41m2 stops
£581Finnair
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Delta Logo
12:55 - 00:34LHR-PWM
16h 39m1 stop
Delta Logo
14:41 - 11:25PWM-LHR
15h 44m1 stop
£587Delta
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Virgin Atlantic Logo
09:55 - 00:03LHR-PWM
19h 08m2 stops
Virgin Atlantic Logo
06:00 - 07:15PWM-LHR
20h 15m2 stops
£597Virgin Atlantic
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Fri, 29 Aug - Wed, 3 Sep
United Airlines Logo
07:25 - 19:29LHR-PWM
17h 04m2 stops
United Airlines Logo
10:05 - 06:20PWM-LHR
15h 15m2 stops
£608United Airlines
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Sat, 13 Sep - Sat, 20 Sep
United Airlines Logo
06:50 - 18:26LHR-PWM
16h 36m2 stops
United Airlines Logo
15:56 - 10:40PWM-LHR
13h 44m2 stops
£650United Airlines
Find Deal
Thu, 28 Aug - Thu, 4 Sep

United Airlines flights from London Heathrow Airport to Portland, Maine

Our best United Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
United Airlines
13 Sept
LHR07:25London Heathrow
17h 04m
2 stops
PWM19:29Portland
20 Sept
PWM10:05Portland
15h 15m
2 stops
LHR06:20London Heathrow
£608
Find similar
United Airlines
28 Aug
LHR06:50London Heathrow
16h 36m
2 stops
PWM18:26Portland
4 Sept
PWM15:56Portland
13h 44m
2 stops
LHR10:40London Heathrow
£650
Find similar
United Airlines
29 Aug
LHR06:50London Heathrow
32h 19m
2 stops
PWM10:09Portland
5 Sept
PWM06:00Portland
9h 40m
1 stop
LHR20:40London Heathrow
£680
Find similar

American Airlines flights from London Heathrow Airport to Portland, Maine

Our best American Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
American Airlines
26 Aug
LHR10:05London Heathrow
15h 31m
1 stop
PWM20:36Portland
2 Sept
PWM12:08Portland
13h 42m
1 stop
LHR06:50London Heathrow
£593
Find similar
American Airlines
13 Sept
LHR10:05London Heathrow
12h 50m
1 stop
PWM17:55Portland
20 Sept
PWM12:21Portland
13h 29m
1 stop
LHR06:50London Heathrow
£598
Find similar
American Airlines
13 Sept
LHR08:55London Heathrow
14h 00m
2 stops
PWM17:55Portland
20 Sept
PWM13:09Portland
16h 11m
1 stop
LHR10:20London Heathrow
£598
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Portland, Maine that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 1 August 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 15/9

08:15-22:07

1 stop18h 52m

Portland

Mon 29/9

14:17-20:45

1 stop25h 28m

£417

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 15/9

08:15-22:07

1 stop18h 52m

Portland

Mon 29/9

07:09-06:30

2 stops18h 21m

£459

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 29/8

08:15-00:17

1 stop21h 02m

Portland

Wed 3/9

06:05-20:45

1 stop9h 40m

£482

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 15/9

12:45-00:11

2 stops16h 26m

Portland

Mon 29/9

06:00-06:20

2 stops19h 20m

£508

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 14/9

08:40-00:11

2 stops20h 31m

Portland

Sun 21/9

14:41-07:15

1 stop11h 34m

£574

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 13/9

08:55-17:55

2 stops14h 00m

Portland

Sat 20/9

13:09-07:50

2 stops13h 41m

£581

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 14/9

12:55-00:34

1 stop16h 39m

Portland

Sun 21/9

14:41-11:25

1 stop15h 44m

£587

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 29/8

09:55-00:03

2 stops19h 08m

Portland

Wed 3/9

06:00-07:15

2 stops20h 15m

£597

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 13/9

07:25-19:29

2 stops17h 04m

Portland

Sat 20/9

10:05-06:20

2 stops15h 15m

£608

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 28/8

06:50-18:26

2 stops16h 36m

Portland

Thu 4/9

15:56-10:40

2 stops13h 44m

£650

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Portland from

How to get the cheapest flight ticket from London Heathrow Airport to Portland, Maine

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portland, Maine?

The cheapest month to fly to Portland, Maine from London Heathrow Airport is in February. Flight prices, which tend to average around £512, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Portland, Maine, with average flight prices from London Heathrow Airport averaging around £538.

What is the cheapest day to depart on your flight to Portland, Maine?

According to our data, Monday is the cheapest day to fly to Portland, Maine from London Heathrow Airport. The lowest ticket price found for a Monday departure recently was £647. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Portland, Maine on Friday is £789.

What is the cheapest time of day to depart on your flight to Portland, Maine?

Our data shows that the cheapest London Heathrow Airport to Portland, Maine flights are usually those with departure times in the evening. Our users have found flights to Portland, Maine in the evening for as low as £606. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £796 on average. Flights to Portland, Maine from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Can stopping save me money on London Heathrow Airport to Portland, Maine flights?

You could potentially save up to 64% on your flight if you consider stops on a London Heathrow Airport to Portland, Maine flight.

When to book flights from London Heathrow Airport to Portland, Maine

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Portland, Maine according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Portland, Maine (LHR to PWM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Portland, Maine

Best price found

£421

Fastest flight time

12h 06m

Direct flights

None

Airports in Portland, Maine

1 airport
The best one-way flight to Portland, Maine from London Heathrow Airport in the past 72 hours is £421. The best return flight deal from London Heathrow Airport to Portland, Maine found on momondo in the last 72 hours is £417.
The fastest flight from London Heathrow Airport to Portland, Maine takes 12h 06m
There are no direct flights from London Heathrow Airport to Portland, Maine. Popular non-direct route for this connection is London Heathrow Airport - Portland Airport.
There is 1 airport near Portland, Maine: Portland (PWM)
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  • How far is London Heathrow to Portland by plane?

    A flight from London Heathrow to Portland will travel around 3170.3 mi. Flights usually cover this in 12h 06m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Heathrow Airport to Portland Airport?

    Prices for flights from London Heathrow Airport to Portland Airport are updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Portland Airport?

  • How old do you have to be to fly from London Heathrow Airport to Portland Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The travel and health documents required for your trip to Portland Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portland Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from London Heathrow Airport to Portland, Maine?

Best airlines flying from London Heathrow Airport to Portland, Maine

Compare and see reviews for airlines that fly from London Heathrow Airport to Portland, Maine with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £389Free CancellationRating
7.0
520 reviews
Search Icelandair flights
JetBluePriceFrom £404Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom £476Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £479Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
KLMPriceFrom £489Free CancellationRating
7.8
1,383 reviews
Search KLM flights
United AirlinesPriceFrom £564Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Freeport
North Conway

Why use momondo?

Why should I use momondo to find a flight deal from London to Portland?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portland from London.

Can I find flights from London to Portland with flexible booking policies on momondo?

All flight searches from London to Portland on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Portland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Portland.

I’m not ready to book a flight from London to Portland right now. Can momondo alert me if prices change?

Price alerts on flights to Portland from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Portland, Maine trip

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