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Cheap flights from London Heathrow Airport to Portland, Maine from £412

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
31 Aug — 7 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 1 August 2026.

Thu 3/911:55
LHR
-
PWM
1 stop17h 30m
JetBlue
Thu 17/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 28/7£482
Wed 2/911:55
LHR
-
PWM
1 stop17h 30m
JetBlue
Wed 9/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 30/7£530
Fri 4/908:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Fri 11/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 27/7£532
Mon 14/911:55
LHR
-
PWM
1 stop16h 59m
JetBlue
Mon 21/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 30/7£534
Tue 22/908:15
LHR
-
PWM
1 stop20h 39m
JetBlue
Tue 29/906:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 31/7£538
Mon 21/911:55
LHR
-
PWM
1 stop16h 59m
JetBlue
Mon 28/906:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 31/7£545
Fri 30/1007:25
LHR
-
PWM
1 stop20h 18m
JetBlue
Sun 8/1106:30
PWM
-
LHR
1 stop22h 00m
JetBlue
Deal found 29/7£545
Thu 1/1008:15
LHR
-
PWM
1 stop20h 39m
JetBlue
Sat 10/1006:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 28/7£547
Wed 30/911:55
LHR
-
PWM
1 stop16h 59m
JetBlue
Sun 4/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 31/7£550
Sat 5/911:55
LHR
-
PWM
1 stop29h 35m
JetBlue
Sat 12/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 28/7£551
Fri 4/907:05
LHR
-
PWM
2 stops22h 54m
Scandinavian Airlines
Fri 11/906:02
PWM
-
LHR
2 stops22h 33m
Scandinavian Airlines
Deal found 28/7£558

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 1 August 2026.

Round-trip from

£482

One-way from

£412

Popular in

August

Cheapest in

May

Average price

£970
JetBlue
  • JetBlue
  • 3/9-17/9
  • 2 total stops
  • 27h 15m total
  • London to Portland
Search Deals
1/12
  • 1/12
  • 2 total stops
  • 25h 53m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 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 1 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 - PWM

LHRPWM

London Heathrow

Wed 2/9

11:55-00:25

1 stop17h 30m

Portland

Wed 9/9

06:00-20:45

1 stop9h 45m

£530
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 15/9

11:55-23:54

1 stop16h 59m

Portland

Tue 22/9

06:00-20:45

1 stop9h 45m

£560

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 11/9

11:55-23:54

1 stop16h 59m

Portland

Fri 18/9

06:00-20:45

1 stop9h 45m

£574

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 4/9

07:05-00:59

2 stops22h 54m

Portland

Fri 11/9

06:02-13:35

3 stops26h 33m

£603

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 3/11

12:05-23:21

2 stops16h 16m

Portland

Sun 8/11

10:50-21:20

1 stop29h 30m

£708

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 2/12

07:30-13:38

2 stops35h 08m

Portland

Sun 6/12

17:06-06:20

1 stop32h 14m

£710

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 7/10

13:50-23:28

2 stops14h 38m

Portland

Sun 11/10

19:25-20:40

2 stops20h 15m

£716

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 22/9

21:25-23:54

2 stops31h 29m

Portland

Tue 29/9

14:50-11:55

2 stops16h 05m

£718
Cheapest one-way

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 1/12

12:15-11:48

3 stops28h 33m

£441

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 25/8

11:55-13:45

1 stop30h 50m

£444

Flights are sorted by cheapest return flights first.

Deals found on 30/7

Showing 1-10 of 15 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 £733 and £1,051 in September.
The cheapest return price found within the last 5 days was £482 on JetBlue (3 Sept–17 Sept).

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated 1 August 2026.
Check out reviews from past customers who have flown with United Airlines from London Heathrow Airport to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,062 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
United Airlines
7.4
Good
10,062 reviews
United Airlines
7.4
Good
10,062 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.

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 1 airline.

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

    JetBlue, Scandinavian Airlines, and United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 16m. Your travel time can differ by up to 6h 38m. The distance from London Heathrow Airport to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from London Heathrow Airport to Portland, Maine round-trip?

    According to our current data, United Airlines (£542), offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that United Airlines is 18% cheaper than the other options available to this destination.

  • 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.
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

Top airline flying from Heathrow to Portland

Discover the top airline that operate flights from Heathrow to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 August 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£542Average£735FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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