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Cheap flights from London Heathrow Airport to Portland, Maine from £447

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
31 Mar — 7 Apr1
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 1 March 2026.

Wed 15/411:55
LHR
-
PWM
1 stop16h 04m
JetBlue
Wed 22/407:30
PWM
-
LHR
1 stop32h 15m
JetBlue
Deal found 1/3£493
Tue 14/408:15
LHR
-
PWM
1 stop19h 44m
JetBlue
Tue 21/407:30
PWM
-
LHR
1 stop21h 00m
JetBlue
Deal found 28/2£517
Mon 13/408:15
LHR
-
PWM
1 stop20h 44m
JetBlue
Mon 20/407:30
PWM
-
LHR
1 stop21h 00m
JetBlue
Deal found 27/2£519
Wed 6/511:55
LHR
-
PWM
1 stop16h 41m
JetBlue
Sat 9/506:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 27/2£552
Mon 13/412:10
LHR
-
PWM
2 stops16h 18m
United Airlines
Mon 20/419:12
PWM
-
LHR
1 stop10h 13m
United Airlines
Deal found 27/2£576
Wed 15/407:25
LHR
-
PWM
2 stops16h 33m
United Airlines
Wed 22/411:09
PWM
-
LHR
2 stops14h 46m
United Airlines
Deal found 1/3£578
Tue 14/408:40
LHR
-
PWM
2 stops21h 06m
Delta
Tue 21/412:46
PWM
-
LHR
2 stops18h 19m
Delta
Deal found 28/2£623
Wed 18/306:30
LHR
-
PWM
2 stops20h 33m
Delta
Mon 23/312:51
PWM
-
LHR
2 stops17h 24m
Delta
Deal found 27/2£626
Sun 12/411:05
LHR
-
PWM
1 stop15h 35m
United Airlines
Sun 19/418:18
PWM
-
LHR
1 stop31h 27m
United Airlines
Deal found 26/2£642

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 1 March 2026.

Round-trip from

£493

One-way from

£447

Popular in

December

Cheapest in

February

Average price

£624
JetBlue
  • JetBlue
  • 15/4-22/4
  • 2 total stops
  • 48h 19m total
  • London to Portland
Search Deals
24/8
  • 24/8
  • 2 total stops
  • 42h 02m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£71 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 1 March 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

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 15/4

11:55-22:59

1 stop16h 04m

Portland

Wed 22/4

07:30-20:45

1 stop32h 15m

£493

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 6/5

11:55-23:36

1 stop16h 41m

Portland

Sat 9/5

06:00-20:45

1 stop9h 45m

£555

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 13/4

12:10-23:28

2 stops16h 18m

Portland

Mon 20/4

19:12-10:25

1 stop10h 13m

£576

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 15/4

07:25-18:58

2 stops16h 33m

Portland

Wed 22/4

11:09-06:55

2 stops14h 46m

£578

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 18/3

06:30-23:03

2 stops20h 33m

Portland

Mon 23/3

14:30-06:20

1 stop11h 50m

£626

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 12/4

11:05-21:40

1 stop15h 35m

Portland

Sun 19/4

09:49-05:55

2 stops15h 06m

£664

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 18/3

06:40-23:03

2 stops20h 23m

Portland

Mon 23/3

14:30-16:25

3 stops21h 55m

£846

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 14/4

08:30-23:28

3 stops19h 58m

Portland

Tue 21/4

11:09-10:00

3 stops17h 51m

£877

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 24/8

20:00-23:57

3 stops32h 57m

£489

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 18/8

11:20-23:57

2 stops17h 37m

£516

Flights are sorted by cheapest return flights first.

Deals found on 28/2

Showing 1-10 of 20 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £304). Flying from London Heathrow Airport to Portland, Maine in June is currently the most expensive (average of £372). 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 1 March 2026.
Check out reviews from past customers who have flown with KLM, Virgin Atlantic, andUnited 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.
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,461 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
680 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,372 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
JetBlue
7.2
Good
2,894 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.1
Good
617 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Crew

8.4

Comfort

7.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 4 different airlines.

  • 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 04m. Your travel time can differ by up to 14m. The distance from London Heathrow Airport to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Portland, Maine round-trip?

    According to our current data, Virgin Atlantic (£469), Icelandair (£487), and KLM (£498) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that Virgin Atlantic is 29% 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £304). Flying from London Heathrow Airport to Portland, Maine in June is currently the most expensive (average of £372). 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Bath

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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
Heathrow to Bangor flights
Southend to Boston flights

Top 4 airlines flying from Heathrow to Portland

Discover the top 4 airlines 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 1 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£469Average£550FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£487Average£640FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£498Average£617FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£554Average£733FlexibilityNo 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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