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Cheap flights from London Heathrow Airport to Portland, Maine from £343

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
20 May — 27 May1
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 20 April 2026.

Tue 29/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Mon 5/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£539
Sat 30/508:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Sat 6/614:37
PWM
-
LHR
1 stop13h 53m
JetBlue
Deal found 15/4£544
Tue 29/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Tue 6/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£553
Wed 16/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Mon 21/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 19/4£562
Thu 1/1011:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Tue 6/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£570
Wed 16/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Tue 22/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 19/4£580
Thu 1/1011:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Mon 5/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£590
Wed 16/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Sun 20/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 19/4£592
Tue 29/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Sun 4/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£592
Thu 28/511:55
LHR
-
PWM
1 stop30h 40m
JetBlue
Thu 4/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 19/4£602
Tue 29/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Fri 9/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£610
Fri 2/1011:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Mon 5/1006:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 15/4£615

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 20 April 2026.

Round-trip from

£539

One-way from

£343

Popular in

December

Cheapest in

February

Average price

£718
JetBlue
  • JetBlue
  • 29/9-5/10
  • 2 total stops
  • 26h 42m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 7/5
  • 1 total stop
  • 16h 08m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 20 April 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 1/10

11:55-23:52

1 stop16h 57m

Portland

Thu 8/10

06:00-20:45

1 stop9h 45m

£629

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 3/10

11:55-23:52

1 stop16h 57m

Portland

Wed 7/10

06:00-20:45

1 stop9h 45m

£635

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 18/9

11:55-23:52

1 stop16h 57m

Portland

Mon 21/9

06:00-20:45

1 stop9h 45m

£670

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 16/9

07:30-18:54

2 stops16h 24m

Portland

Tue 22/9

10:43-06:30

2 stops14h 47m

£672

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 2/10

11:55-23:52

1 stop16h 57m

Portland

Fri 9/10

06:00-20:45

1 stop9h 45m

£683

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 4/9

07:25-19:19

2 stops16h 54m

Portland

Tue 8/9

19:35-06:55

1 stop30h 20m

£698
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 14/5

11:05-21:19

1 stop15h 14m

Portland

Mon 18/5

06:00-21:35

1 stop10h 35m

£724

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 16/9

16:40-23:59

1 stop12h 19m

Portland

Sun 20/9

10:43-06:30

2 stops14h 47m

£724

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 15/5

13:50-23:23

2 stops14h 33m

Portland

Fri 22/5

06:00-06:45

1 stop19h 45m

£726

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 3/6

08:40-23:09

2 stops19h 29m

Portland

Wed 10/6

16:50-13:05

2 stops15h 15m

£780

Flights are sorted by cheapest return flights first.

Deals found on 16/4

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

What is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £502). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £1,155). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 20 April 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
9,607 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,607 reviews
United Airlines
7.4
Good
9,607 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 24m. Your travel time can differ by up to 33m. 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 (£539), offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that United Airlines is 21% 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.

  • What is the cheapest month to book a flight from London Heathrow Airport to Portland, Maine?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £502). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £1,155). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 20 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£539Average£737FlexibilityNo 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.

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