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Cheap flights from London Heathrow Airport to Portland, Maine from £450

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
11 Jul — 18 Jul1
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 11 June 2026.

Mon 21/908:15
LHR
-
PWM
1 stop20h 37m
JetBlue
Mon 28/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 7/6£530
Wed 8/708:15
LHR
-
PWM
1 stop21h 01m
JetBlue
Mon 13/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 10/6£551
Tue 7/711:55
LHR
-
PWM
1 stop30h 50m
JetBlue
Tue 14/713:25
PWM
-
LHR
1 stop15h 05m
JetBlue
Deal found 7/6£573
Sat 29/808:15
LHR
-
PWM
1 stop33h 06m
JetBlue
Wed 2/914:40
PWM
-
LHR
1 stop25h 05m
JetBlue
Deal found 9/6£599
Sat 4/708:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Fri 10/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 6/6£608
Mon 6/708:15
LHR
-
PWM
1 stop33h 15m
JetBlue
Fri 24/714:40
PWM
-
LHR
1 stop25h 05m
JetBlue
Deal found 9/6£640
Mon 6/708:15
LHR
-
PWM
1 stop33h 15m
JetBlue
Mon 13/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 7/6£644
Wed 9/1206:35
LHR
-
PWM
2 stops17h 49m
United Airlines
Sun 13/1217:06
PWM
-
LHR
1 stop23h 14m
United Airlines
Deal found 6/6£666
Mon 21/907:30
LHR
-
PWM
2 stops15h 59m
United Airlines
Mon 28/911:35
PWM
-
LHR
1 stop14h 10m
United Airlines
Deal found 7/6£667

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 11 June 2026.

Round-trip from

£530

One-way from

£450

Popular in

August

Cheapest in

May

Average price

£840
JetBlue
  • JetBlue
  • 21/9-28/9
  • 2 total stops
  • 30h 22m total
  • London to Portland
Search Deals
10/8
  • 10/8
  • 3 total stops
  • 31h 20m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£84 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 11 June 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 8/7

08:15-00:16

1 stop21h 01m

Portland

Mon 13/7

06:00-20:45

1 stop9h 45m

£574

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 4/7

08:15-00:25

1 stop21h 10m

Portland

Fri 10/7

06:00-20:45

1 stop9h 45m

£608

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 21/9

07:30-18:29

2 stops15h 59m

Portland

Mon 28/9

11:35-06:45

1 stop14h 10m

£667

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 29/8

07:25-19:17

2 stops16h 52m

Portland

Wed 2/9

15:47-21:20

1 stop24h 33m

£715

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 8/7

10:50-23:51

2 stops18h 01m

Portland

Mon 13/7

10:55-07:15

1 stop15h 20m

£715

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 6/7

07:30-19:27

2 stops16h 57m

Portland

Mon 13/7

17:00-11:55

1 stop13h 55m

£716

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 28/8

06:50-18:29

2 stops16h 39m

Portland

Sun 6/9

15:47-10:40

2 stops13h 53m

£716

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 21/10

08:15-23:52

1 stop20h 37m

Portland

Thu 29/10

06:30-20:45

1 stop10h 15m

£728

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 4/7

09:30-21:41

2 stops17h 11m

Portland

Fri 10/7

15:16-11:55

2 stops15h 39m

£743
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 23/7

13:50-23:30

2 stops14h 40m

Portland

Thu 30/7

15:16-09:20

1 stop13h 04m

£819

Flights are sorted by cheapest return flights first.

Deals found on 7/6

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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?

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 11 June 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
9,804 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,804 reviews
United Airlines
7.4
Good
9,804 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 and United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 15h 59m. Your travel time can differ by up to 5h 02m. 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 (£545), offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that United Airlines is 17% 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
Southend to Boston flights
Heathrow to Bangor 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 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£545Average£739FlexibilityNo 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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