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Cheap flights from London Heathrow Airport to Portland, Maine from £436

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
13 Sep — 20 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Portland

Enter your travel dates to find the best prices.

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 14 August 2026.

Fri 25/911:55 -
1 stop16h 59m
Fri 2/1006:00 -
1 stop9h 45m
Deal found 11/8£637
Fri 11/911:55 -
1 stop16h 59m
Sun 20/906:00 -
1 stop9h 45m
Deal found 13/8£638
Sun 15/1112:20 -
1 stop16h 23m
Sun 22/1105:50 -
2 stops34h 10m
Deal found 9/8£644
Fri 13/1112:20 -
1 stop16h 23m
Sun 22/1105:50 -
2 stops34h 10m
Deal found 12/8£646
Fri 6/1107:25 -
1 stop21h 18m
Sun 8/1106:30 -
1 stop22h 00m
Deal found 9/8£647
Fri 13/1112:20 -
1 stop16h 23m
Sun 15/1106:30 -
1 stop22h 00m
Deal found 12/8£649
Fri 6/1108:15 -
2 stops20h 28m
Sun 8/1106:30 -
2 stops30h 00m
Deal found 9/8£655
Fri 13/1107:25 -
1 stop21h 18m
Sun 15/1105:50 -
2 stops20h 20m
Deal found 12/8£658
Wed 9/919:50 -
2 stops33h 06m
Wed 16/906:02 -
2 stops28h 58m
Deal found 12/8£692

Find flight deals from Heathrow to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 August 2026.

Round-trip from

£637

One-way from

£436

Popular in

August

Cheapest in

April

Average price

£968
JetBlue
  • JetBlue
  • 25/9-2/10
  • 2 total stops
  • 26h 44m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 10/10
  • 1 total stop
  • 20h 37m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£93 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Portland 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, Cheapflights users made 858,174 searches. Data last updated 14 August 2026.
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

Fri 11/9

11:55-23:54

1 stop16h 59m

Portland

Sun 20/9

06:00-20:45

1 stop9h 45m

£638

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 15/11

12:20-23:43

1 stop16h 23m

Portland

Sun 22/11

05:50-21:00

2 stops34h 10m

£644

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 6/11

07:25-23:43

1 stop21h 18m

Portland

Sun 8/11

05:50-07:10

2 stops20h 20m

£657

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 1/9

07:25-19:24

2 stops16h 59m

Portland

Tue 15/9

15:43-09:20

1 stop12h 37m

£742
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 9/9

15:20-23:32

1 stop13h 12m

Portland

Wed 16/9

06:06-21:25

1 stop10h 19m

£752

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 10/9

07:25-19:24

2 stops16h 59m

Portland

Thu 17/9

14:38-10:40

1 stop15h 02m

£758

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 14/11

06:50-18:52

2 stops17h 02m

Portland

Tue 17/11

08:47-05:55

1 stop16h 08m

£759

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 24/9

06:50-18:17

2 stops16h 27m

Portland

Thu 1/10

09:50-05:55

2 stops15h 05m

£760
Cheapest one-way

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 10/10

08:15-23:52

1 stop20h 37m

£436

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 12/10

08:15-23:52

1 stop20h 37m

£437

Flights are sorted by cheapest return flights first.

Deals found on 10/8

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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.
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

How much does it cost for a return flight from London Heathrow Airport to Portland, Maine?

Airfare is below average for this route at the moment.

London Heathrow Airport to Portland, Maine flights typically cost between £732 and £968 in September.
The cheapest return price found within the last 5 days was £637 on JetBlue (25 Sept–2 Oct).

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Portland. 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 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?

    JetBlue and United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 59m. Your travel time can differ by up to . The distance from London Heathrow Airport to Portland, Maine is about 3173 mi.

  • 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

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Alternative routes for Heathrow to Portland

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

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

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