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Cheap flights from London Heathrow Airport to Portland, Maine from £432

LHR — PWM
25 Sep — 2 Oct1
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

Thu 15/1007:05 -
2 stops22h 05m
Wed 21/1006:04 -
2 stops22h 31m
Deal found 21/8£539
Tue 22/908:15 -
1 stop20h 39m
Tue 29/906:00 -
1 stop9h 45m
Deal found 23/8£577
Thu 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops29h 00m
Deal found 24/8£600
Tue 22/921:25 -
2 stops31h 29m
Tue 29/906:00 -
2 stops24h 55m
Deal found 23/8£617
Wed 7/1011:55 -
1 stop16h 59m
Wed 14/1006:00 -
1 stop9h 45m
Deal found 23/8£636
Tue 15/921:25 -
2 stops31h 29m
Sat 19/906:00 -
2 stops24h 55m
Deal found 22/8£644
Thu 15/1008:15 -
1 stop20h 37m
Wed 21/1006:00 -
1 stop9h 45m
Deal found 21/8£663
Mon 12/1007:05 -
2 stops22h 05m
Wed 21/1006:04 -
2 stops22h 31m
Deal found 22/8£669
Mon 21/919:50 -
2 stops33h 04m
Mon 28/906:00 -
2 stops35h 55m
Deal found 24/8£671

Find flight deals from Heathrow to Portland

Round-trip from

£539

One-way from

£432

Popular in

September

Cheapest in

November

Average price

£958
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/10-21/10
  • 4 total stops
  • 44h 36m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 10/10
  • 1 total stop
  • 20h 39m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£196 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease (£59 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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

Thu 15/10

07:05-00:10

2 stops22h 05m

Portland

Wed 21/10

06:04-09:20

3 stops22h 16m

£586

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

06:40-00:21

2 stops22h 41m

Portland

Sun 6/12

06:00-16:00

2 stops29h 00m

£600
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 7/10

11:55-23:54

1 stop16h 59m

Portland

Wed 14/10

06:00-20:45

1 stop9h 45m

£636

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 12/10

07:05-00:10

2 stops22h 05m

Portland

Wed 21/10

06:04-09:35

2 stops22h 31m

£669

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 9/10

07:25-19:24

2 stops16h 59m

Portland

Fri 16/10

15:41-10:25

1 stop13h 44m

£677

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

06:50-18:47

2 stops16h 57m

Portland

Sun 6/12

15:15-21:20

1 stop25h 05m

£686

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 10/10

06:50-18:12

2 stops16h 22m

Portland

Sat 17/10

14:32-09:20

2 stops13h 48m

£694
Cheapest one-way

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 10/10

08:15-23:52

1 stop20h 37m

£435

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 16/9

06:00-23:54

2 stops22h 54m

£460

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 10/10

08:40-00:10

2 stops20h 30m

£562

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 13 resultsSorted by cheapest first
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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

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 £858 and £1,250 in October.
The cheapest return price found within the last 5 days was £539 on Scandinavian Airlines (15 Oct–21 Oct).

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, 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 5h 06m. 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 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

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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.

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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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