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Cheap flights from London Heathrow Airport to Portland, Maine from £472

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
14 Jul — 21 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 14 June 2026.

Wed 8/708:15
LHR
-
PWM
1 stop21h 01m
JetBlue
Mon 13/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 10/6£550
Fri 28/808:15
LHR
-
PWM
1 stop20h 59m
JetBlue
Sun 6/913:17
PWM
-
LHR
1 stop15h 13m
JetBlue
Deal found 9/6£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£598
Tue 29/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Sat 3/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 11/6£619
Mon 6/708:15
LHR
-
PWM
1 stop33h 15m
JetBlue
Fri 24/714:40
PWM
-
LHR
1 stop25h 05m
JetBlue
Deal found 9/6£639
Wed 9/1206:35
LHR
-
PWM
2 stops17h 49m
United Airlines
Sun 13/1215:15
PWM
-
LHR
1 stop24h 20m
United Airlines
Deal found 8/6£665
Fri 28/811:55
LHR
-
PWM
1 stop17h 19m
Multiple Airlines
Sun 6/906:00
PWM
-
LHR
2 stops20h 40m
Multiple Airlines
Deal found 9/6£679

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 June 2026.

Round-trip from

£550

One-way from

£472

Popular in

August

Cheapest in

May

Average price

£838
JetBlue
  • JetBlue
  • 8/7-13/7
  • 2 total stops
  • 30h 46m total
  • London to Portland
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 15/10
  • 2 total stops
  • 17h 32m 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 14 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
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 29/9

11:55-23:52

1 stop16h 57m

Portland

Sat 3/10

06:00-20:45

1 stop9h 45m

£619

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 9/12

06:35-19:24

2 stops17h 49m

Portland

Sun 13/12

15:15-20:35

1 stop24h 20m

£665

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 29/9

13:50-23:28

2 stops14h 38m

Portland

Sat 3/10

10:43-05:55

1 stop14h 12m

£684

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 8/7

12:10-23:30

2 stops16h 20m

Portland

Mon 13/7

15:46-07:15

1 stop10h 29m

£712

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

£714

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

£726
Cheapest one-way

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 15/10

11:20-23:52

2 stops17h 32m

£472

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 15/10

09:55-09:08

3 stops52h 13m

£483

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 2/7

19:50-00:25

2 stops33h 35m

£513

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 7/8

09:50-10:27

3 stops29h 37m

£572

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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?

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 14 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
9,815 reviews
Check prices

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

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
9,815 reviews
United Airlines
7.4
Good
9,815 reviews
Check prices

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

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 16h 57m. Your travel time can differ by up to 52m. 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 (£544), 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 14 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£544Average£737FlexibilityNo 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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