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Cheap flights from London Heathrow Airport to Portland from $598

This is the cheapest one-way 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 8/25. 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
1 adult, Economy, 0 bags

Find the cheapest flights from London Heathrow Airport to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
8:15 am - 11:54 pm-
20h 39m
JetBlue Logo
6:00 am - 9:30 am-
22h 30m
$724JetBlue
Tue, Sep 22 - Tue, Sep 29
JetBlue Logo
8:15 am - 11:54 pm-
20h 39m
JetBlue Logo
6:00 am - 9:30 am-
22h 30m
$728JetBlue
Tue, Sep 22 - Tue, Sep 29
JetBlue Logo
11:55 am - 11:54 pm-
16h 59m
JetBlue Logo
6:00 am - 9:30 am-
22h 30m
$733JetBlue
Mon, Sep 21 - Mon, Sep 28
JetBlue Logo
11:55 am - 11:54 pm-
16h 59m
JetBlue Logo
6:00 am - 8:45 pm-
9h 45m
$740JetBlue
Wed, Sep 30 - Sun, Oct 4
JetBlue Logo
11:55 am - 11:54 pm-
16h 59m
JetBlue Logo
6:00 am - 8:45 pm-
9h 45m
$741JetBlue
Wed, Sep 30 - Sun, Oct 4
JetBlue Logo
8:15 am - 12:30 pm-
33h 15m
JetBlue Logo
6:00 am - 8:45 pm-
9h 45m
$751JetBlue
Mon, Sep 7 - Mon, Sep 21
JetBlue Logo
11:55 am - 11:54 pm-
16h 59m
JetBlue Logo
6:00 am - 8:45 pm-
9h 45m
$752JetBlue
Mon, Sep 14 - Mon, Sep 21
JetBlue Logo
11:55 am - 11:54 pm-
16h 59m
JetBlue Logo
6:00 am - 8:45 pm-
9h 45m
$753JetBlue
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
8:15 am - 11:54 pm-
20h 39m
Multiple Airlines Logo
6:00 am - 12:40 pm-
25h 40m
$794Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
8:15 am - 11:54 pm-
20h 39m
Multiple Airlines Logo
6:00 am - 12:40 pm-
25h 40m
$799Multiple Airlines
Tue, Sep 22 - Tue, Sep 29

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Scandinavian Airlines flights from London Heathrow Airport to Portland, Maine

Our best Scandinavian Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
Scandinavian Airlines
Sep 22
LHR7:05 amLondon Heathrow
21h 51m
2 stops
PWM11:56 pmPortland
Sep 29
PWM6:02 amPortland
28h 58m
3 stops
LHR4:00 pmLondon Heathrow
$804
Scandinavian Airlines
Sep 22
LHR7:05 amLondon Heathrow
21h 51m
2 stops
PWM11:56 pmPortland
Sep 29
PWM6:02 amPortland
22h 33m
2 stops
LHR9:35 amLondon Heathrow
$889
Scandinavian Airlines
Sep 23
LHR7:05 amLondon Heathrow
21h 51m
2 stops
PWM11:56 pmPortland
Sep 30
PWM6:02 amPortland
28h 58m
3 stops
LHR4:00 pmLondon Heathrow
$905

Air Canada flights from London Heathrow Airport to Portland, Maine

Our best Air Canada deals on London Heathrow Airport to Portland, Maine flight tickets
Air Canada
Dec 2
LHR6:00 pmLondon Heathrow
33h 57m
2 stops
PWM10:57 pmPortland
Dec 6
PWM6:00 amPortland
44h 10m
2 stops
LHR7:10 amLondon Heathrow
$1,021
Air Canada
Aug 8
LHR9:30 amLondon Heathrow
19h 00m
2 stops
PWM11:30 pmPortland
Aug 13
PWM6:00 amPortland
23h 00m
2 stops
LHR10:00 amLondon Heathrow
$1,882

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 5, 2026.
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

Cheapest round-trip

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/22

8:15 am-11:54 pm

1 stop20h 39m

Portland

Tue 9/29

6:00 am-9:30 am

1 stop22h 30m

$724

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/22

8:15 am-11:54 pm

1 stop20h 39m

Portland

Tue 9/29

6:00 am-9:30 am

1 stop22h 30m

$728

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/21

11:55 am-11:54 pm

1 stop16h 59m

Portland

Mon 9/28

6:00 am-9:30 am

1 stop22h 30m

$733
Quickest round-trip

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 9/30

11:55 am-11:54 pm

1 stop16h 59m

Portland

Sun 10/4

6:00 am-8:45 pm

1 stop9h 45m

$740

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 9/30

11:55 am-11:54 pm

1 stop16h 59m

Portland

Sun 10/4

6:00 am-8:45 pm

1 stop9h 45m

$741

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/7

8:15 am-12:30 pm

1 stop33h 15m

Portland

Mon 9/21

6:00 am-8:45 pm

1 stop9h 45m

$751

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 9/14

11:55 am-11:54 pm

1 stop16h 59m

Portland

Mon 9/21

6:00 am-8:45 pm

1 stop9h 45m

$752

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/15

11:55 am-11:54 pm

1 stop16h 59m

Portland

Tue 9/22

6:00 am-8:45 pm

1 stop9h 45m

$753

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/22

8:15 am-11:54 pm

1 stop20h 39m

Portland

Tue 9/29

6:00 am-12:40 pm

2 stops25h 40m

$794

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/22

8:15 am-11:54 pm

1 stop20h 39m

Portland

Tue 9/29

6:00 am-12:40 pm

2 stops25h 40m

$799

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between London Heathrow Airport and Portland, Maine?

Prices are currently low for flights on this route.

Typical prices usually range from $987 to $1,415.
The lowest price recently found on this route was $724.

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

The cheapest month to fly to Portland, Maine from London Heathrow Airport is in December. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Portland, Maine during the month of December, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $714.

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 round-trip 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

Fastest flight time

11h 57m

Direct flights

None
The fastest flight from London Heathrow Airport to Portland, Maine takes 11h 57m
There are no direct flights from London Heathrow Airport to Portland, Maine. There are no popular flight routes from London Heathrow Airport to Portland, Maine.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Portland, Maine

  • How far is London Heathrow to Portland by plane?

    A flight from London Heathrow to Portland will travel around 3170.3 mi. A reasonable flight in good conditions will take 11h 57m.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Portland Airport.

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

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Boothbay Harbor
Jackson
Lewiston
Brunswick
Freeport
Conway
Gorham
Bartlett
Auburn
Windham
Intervale
Bath
Oxford
Georgetown
Falmouth
Tamworth

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Portland for you.

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

Yes. momondo allows you to filter the results for London to Portland flights to just show those with 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?

Of course. momondo tracks the price of London to Portland flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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