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Cheap flights from London Heathrow Airport to Portland, Maine from £366

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
28 May — 4 Jun1
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 28 April 2026.

Thu 28/511:55
LHR
-
PWM
1 stop30h 40m
JetBlue
Thu 4/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 23/4£612
Sat 19/908:15
LHR
-
PWM
1 stop20h 37m
JetBlue
Sat 26/906:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 26/4£665
Tue 2/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Tue 9/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 25/4£684
Sun 28/608:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Sun 5/706:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 25/4£698
Mon 18/508:15
LHR
-
PWM
1 stop19h 48m
JetBlue
Mon 25/506:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 27/4£712
Sat 19/907:25
LHR
-
PWM
2 stops16h 54m
United Airlines
Sat 26/915:25
PWM
-
LHR
1 stop10h 50m
United Airlines
Deal found 26/4£727
Sun 21/619:50
LHR
-
PWM
2 stops45h 40m
Multiple Airlines
Fri 7/820:15
PWM
-
LHR
2 stops43h 45m
Multiple Airlines
Deal found 23/4£741
Tue 2/619:50
LHR
-
PWM
2 stops33h 53m
Scandinavian Airlines
Tue 9/606:30
PWM
-
LHR
2 stops28h 55m
Scandinavian Airlines
Deal found 25/4£753
Tue 2/611:20
LHR
-
PWM
2 stops16h 49m
Virgin Atlantic
Tue 9/618:57
PWM
-
LHR
1 stop13h 18m
Virgin Atlantic
Deal found 25/4£760
Wed 26/811:55
LHR
-
PWM
1 stop17h 19m
JetBlue
Mon 31/814:40
PWM
-
LHR
1 stop13h 50m
JetBlue
Deal found 25/4£772
Mon 8/606:00
LHR
-
PWM
2 stops17h 35m
Austrian Airlines
Mon 15/610:55
PWM
-
LHR
1 stop14h 00m
Austrian Airlines
Deal found 24/4£776

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 28 April 2026.

Round-trip from

£612

One-way from

£366

Popular in

December

Cheapest in

February

Average price

£717
JetBlue
  • JetBlue
  • 28/5-4/6
  • 2 total stops
  • 40h 25m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 27/5
  • 1 total stop
  • 20h 43m 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 28 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 28/5

11:55-13:35

1 stop30h 40m

Portland

Thu 4/6

06:00-20:45

1 stop9h 45m

£612

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 18/5

09:55-23:09

2 stops18h 14m

Portland

Mon 25/5

14:38-06:45

1 stop11h 07m

£788

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 28/5

06:30-23:09

2 stops21h 39m

Portland

Thu 4/6

06:00-06:45

2 stops19h 45m

£803

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 28/5

08:40-23:09

2 stops19h 29m

Portland

Thu 4/6

06:25-06:20

1 stop18h 55m

£803

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 2/6

07:05-00:43

3 stops22h 38m

Portland

Tue 9/6

06:30-09:35

2 stops22h 05m

£814

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/6

19:45-23:05

2 stops32h 20m

Portland

Thu 18/6

16:50-07:55

2 stops34h 05m

£839

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 28/6

06:50-18:29

2 stops16h 39m

Portland

Sun 5/7

14:20-09:20

2 stops14h 00m

£847

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 21/6

19:50-12:30

2 stops45h 40m

Portland

Fri 7/8

14:53-08:50

1 stop12h 57m

£850

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 14/5

08:45-23:29

2 stops19h 44m

Portland

Sun 17/5

19:10-20:40

2 stops20h 30m

£851
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/6

16:40-23:51

1 stop12h 11m

Portland

Thu 18/6

06:00-20:40

1 stop9h 40m

£876

Flights are sorted by cheapest return flights first.

Deals found on 27/4

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 £501). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £1,153). 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 28 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
9,665 reviews
Check prices

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

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
9,665 reviews
United Airlines
7.4
Good
9,665 reviews
Check prices

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

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, Delta, and Virgin Atlantic can get you from London Heathrow Airport to Portland, Maine in just under 18h 14m. Your travel time can differ by up to 12h 26m. 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 (£538), 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 £501). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £1,153). 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 28 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£538Average£736FlexibilityNo 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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