Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Portland, Maine from £435

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
26 Aug — 2 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 27 July 2026.

Thu 3/911:55
LHR
-
PWM
1 stop17h 30m
JetBlue
Thu 17/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 24/7£488
Fri 4/908:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Wed 16/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 23/7£489
Thu 3/908:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Thu 10/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 26/7£506
Thu 3/911:55
LHR
-
PWM
1 stop17h 30m
JetBlue
Wed 9/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 23/7£516
Mon 2/1107:25
LHR
-
PWM
1 stop21h 18m
JetBlue
Sun 15/1106:30
PWM
-
LHR
1 stop22h 00m
JetBlue
Deal found 23/7£524
Thu 3/907:05
LHR
-
PWM
2 stops22h 54m
Scandinavian Airlines
Wed 9/906:02
PWM
-
LHR
2 stops22h 33m
Scandinavian Airlines
Deal found 22/7£547
Tue 27/1012:20
LHR
-
PWM
1 stop15h 23m
JetBlue
Thu 5/1106:30
PWM
-
LHR
1 stop22h 00m
JetBlue
Deal found 22/7£563
Sat 29/808:15
LHR
-
PWM
1 stop33h 15m
JetBlue
Wed 2/914:40
PWM
-
LHR
1 stop25h 05m
JetBlue
Deal found 22/7£578
Wed 9/911:55
LHR
-
PWM
1 stop16h 59m
JetBlue
Fri 11/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 24/7£594

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 27 July 2026.

Round-trip from

£488

One-way from

£435

Popular in

August

Cheapest in

May

Average price

£739
JetBlue
  • JetBlue
  • 3/9-17/9
  • 2 total stops
  • 27h 15m total
  • London to Portland
Search Deals
17/8
  • 17/8
  • 3 total stops
  • 49h 40m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£104 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 27 July 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

Thu 3/9

08:15-00:25

1 stop21h 10m

Portland

Thu 10/9

06:00-20:45

1 stop9h 45m

£506

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 3/9

08:15-00:25

1 stop21h 10m

Portland

Wed 9/9

06:00-09:30

1 stop22h 30m

£539
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 9/9

11:55-23:54

1 stop16h 59m

Portland

Fri 11/9

06:00-20:45

1 stop9h 45m

£594

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 3/9

08:15-00:25

1 stop21h 10m

Portland

Thu 10/9

16:45-07:55

2 stops34h 10m

£626

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 4/9

17:30-00:59

2 stops36h 29m

Portland

Wed 16/9

06:02-09:35

2 stops22h 33m

£665

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/11

09:00-23:59

2 stops19h 59m

Portland

Sun 15/11

19:20-20:35

2 stops20h 15m

£717

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 8/9

07:25-19:24

2 stops16h 59m

Portland

Tue 15/9

06:06-21:25

1 stop10h 19m

£718

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 2/12

07:30-22:57

2 stops20h 27m

Portland

Sun 6/12

17:06-20:35

1 stop22h 29m

£719

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 6/9

17:55-19:24

2 stops30h 29m

Portland

Sun 13/9

18:53-21:35

1 stop21h 42m

£732
Cheapest one-way
Fastest single journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 10/10

11:20-23:52

2 stops17h 32m

£461

Flights are sorted by cheapest return flights first.

Deals found on 25/7

Showing 1-10 of 17 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 £740 and £1,061 in September.
The cheapest return price found within the last 5 days was £488 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 27 July 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
10,038 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,038 reviews
United Airlines
7.4
Good
10,038 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

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 Scandinavian Airlines can get you from London Heathrow Airport to Portland, Maine in just under 21h 10m. Your travel time can differ by up to 15h 19m. 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 (£547), 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 27 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£547Average£742FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.