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Cheap flights from London Heathrow Airport to Portland, Maine from £596

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
29 Dec — 5 Jan1
1 adult
1 adult, Economy, 0 bags

Find 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 29 November 2025.

Thu 4/1208:15LHR - PWM
2 stops19h 37mAmerican Airlines
Mon 8/1212:39PWM - LHR
1 stop12h 56mAmerican Airlines
Deal found 25/11£596
Wed 24/1213:30LHR - PWM
2 stops15h 29mUnited Airlines
Wed 31/1214:55PWM - LHR
1 stop12h 30mUnited Airlines
Deal found 26/11£878
Thu 25/1206:35LHR - PWM
2 stops32h 09mUnited Airlines
Thu 1/119:30PWM - LHR
1 stop10h 20mUnited Airlines
Deal found 26/11£910
Thu 4/1206:30LHR - PWM
2 stops20h 53mVirgin Atlantic
Mon 8/1206:08PWM - LHR
1 stop21h 52mVirgin Atlantic
Deal found 27/11£982
Thu 4/1212:30LHR - PWM
1 stop14h 53mDelta
Mon 8/1216:53PWM - LHR
1 stop10h 52mDelta
Deal found 27/11£995
Fri 26/1213:30LHR - PWM
2 stops15h 29mUnited Airlines
Fri 2/105:30PWM - LHR
1 stop20h 10mUnited Airlines
Deal found 28/11£1,001

Cheap 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 29 November 2025.

Round-trip from

£602

Popular in

December

Cheapest in

February

Average price

£559
Austrian Airlines
  • Austrian Airlines
  • 11/1-18/1
  • 2 total stops
  • 48h 40m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£35 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 November 2025
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 29 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Portland that are best for you.

Fly from

Heathrow

Fly to

Portland

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 11/1

18:00-18:50

1 stop29h 50m

Portland

Sun 18/1

08:35-08:25

1 stop18h 50m

£602

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 11/1

07:30-18:50

2 stops16h 20m

Portland

Sun 18/1

16:10-05:55

1 stop32h 45m

£604

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 11/1

07:30-18:50

2 stops16h 20m

Portland

Sun 18/1

19:27-07:10

2 stops30h 43m

£608

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 10/1

09:10-18:54

2 stops14h 44m

Portland

Sat 17/1

15:05-09:10

1 stop13h 05m

£647

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 24/12

13:30-23:59

2 stops15h 29m

Portland

Wed 31/12

10:19-05:55

2 stops14h 36m

£878

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 25/12

06:35-09:44

2 stops32h 09m

Portland

Thu 1/1

06:00-06:40

2 stops19h 40m

£910

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 26/12

13:30-23:59

2 stops15h 29m

Portland

Fri 2/1

05:30-06:40

1 stop20h 10m

£1,001

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 22/12

16:00-18:11

1 stop31h 11m

Portland

Sun 4/1

19:01-08:30

2 stops56h 29m

£1,082

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 4/1

16:50-12:08

3 stops48h 18m

£1,967

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 1/1

08:00-18:11

1 stop15h 11m

£2,476

Flights are sorted by cheapest return flights first.

Deals found on 26/11

Showing 1-10 of 19 results
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 £320). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £381). 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.

What is the cheapest time of day to fly from LHR to PWM?

Find hourly flight availability from Heathrow to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 November 2025.

When flying from London Heathrow Airport to Portland, Maine, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 33% versus a flight at midday.

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 29 November 2025.
Check out reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic 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
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,423 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Finnair
7.6
Good
1,334 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,056 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
JetBlue
7.2
Good
2,903 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 7 different airlines.

  • How long is the flight from London Heathrow Airport to Portland, Maine?

    Austrian Airlines and United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 20m. Your travel time can differ by up to 13h 30m. 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, Icelandair (£389), JetBlue (£404), and Virgin Atlantic (£478) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that Icelandair is 40% 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 £320). Flying from London Heathrow Airport to Portland, Maine in December is currently the most expensive (average of £381). 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
Southend to Boston flights
Heathrow to Bangor flights

Top 7 airlines flying from Heathrow to Portland

Discover the top 7 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 29 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£389Average£600FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£404Average£535FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Virgin AtlanticCheapest£478Average£627FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£479Average£625FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£507Average£629FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£520Average£934FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£564Average£747FlexibilityNo 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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