Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Portland, Maine from £439

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
3 Mar — 10 Mar1
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 February 2026.

Mon 2/312:05
LHR
-
PWM
2 stops16h 15m
United Airlines
Mon 9/319:09
PWM
-
LHR
1 stop11h 16m
United Airlines
Deal found 31/1£563
Mon 16/311:10
LHR
-
PWM
2 stops15h 54m
United Airlines
Mon 23/305:45
PWM
-
LHR
1 stop22h 10m
United Airlines
Deal found 30/1£570
Wed 11/307:30
LHR
-
PWM
2 stops15h 43m
United Airlines
Wed 18/315:44
PWM
-
LHR
2 stops15h 31m
United Airlines
Deal found 30/1£570
Mon 2/309:10
LHR
-
PWM
1 stop16h 18m
Austrian Airlines
Mon 9/311:30
PWM
-
LHR
1 stop17h 40m
Austrian Airlines
Deal found 31/1£571
Wed 11/308:00
LHR
-
PWM
1 stop14h 25m
Austrian Airlines
Wed 18/311:30
PWM
-
LHR
1 stop14h 50m
Austrian Airlines
Deal found 30/1£581
Wed 11/306:40
LHR
-
PWM
2 stops20h 23m
Scandinavian Airlines
Wed 18/314:30
PWM
-
LHR
3 stops20h 05m
Scandinavian Airlines
Deal found 30/1£632
Thu 5/212:05
LHR
-
PWM
2 stops16h 25m
United Airlines
Mon 9/215:12
PWM
-
LHR
2 stops15h 03m
United Airlines
Deal found 31/1£1,054

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 February 2026.

Round-trip from

£563

One-way from

£439

Popular in

December

Cheapest in

February

Average price

£518
United Airlines
  • United Airlines
  • 2/3-9/3
  • 4 total stops
  • 31h 21m total
  • London to Portland
Search Deals
10/6
  • 10/6
  • 1 total stop
  • 12h 31m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£69 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 February 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 February 2026.
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

Mon 2/3

12:05-23:20

2 stops16h 15m

Portland

Mon 9/3

19:09-10:25

1 stop11h 16m

£563

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 16/3

11:10-23:04

2 stops15h 54m

Portland

Mon 23/3

11:30-06:40

2 stops15h 10m

£570

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 11/3

07:30-19:13

2 stops15h 43m

Portland

Wed 18/3

15:44-11:15

2 stops15h 31m

£570

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/3

09:10-20:28

1 stop16h 18m

Portland

Mon 9/3

11:30-09:10

1 stop17h 40m

£571

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 11/3

08:00-18:25

1 stop14h 25m

Portland

Wed 18/3

11:30-06:20

1 stop14h 50m

£581

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 16/3

08:00-18:25

1 stop14h 25m

Portland

Mon 23/3

11:30-06:20

1 stop14h 50m

£581

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 11/3

06:40-23:03

2 stops20h 23m

Portland

Wed 18/3

14:30-14:35

3 stops20h 05m

£632

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 16/3

06:40-23:59

2 stops21h 19m

Portland

Mon 23/3

14:30-14:35

3 stops20h 05m

£632

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 10/6

16:05-23:36

1 stop12h 31m

£439

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 7/7

12:00-23:36

2 stops16h 36m

£471

Flights are sorted by cheapest return flights first.

Deals found on 30/1

Showing 1-10 of 15 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 £321). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of £366). 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.

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 February 2026.
Check out reviews from past customers who have flown with KLM, Finnair, 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
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,446 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Finnair
7.6
Good
1,357 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,226 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
JetBlue
7.2
Good
2,891 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
606 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Overall

7.7

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 6 different airlines.

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

    United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 15m. Your travel time can differ by up to . The distance from London Heathrow Airport to Portland, Maine is about 3173 mi.

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

    According to our current data, JetBlue (£141), Finnair (£462), and Virgin Atlantic (£462) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that JetBlue is 78% 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 £321). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of £366). 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

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
Stansted to Boston flights
London City to Boston flights
Luton to Boston flights
Southend to Boston flights
Heathrow to Bangor flights

Top 6 airlines flying from Heathrow to Portland

Discover the top 6 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 February 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£141Average£516FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£462Average£623FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£462Average£541FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£480Average£630FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£490Average£608FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£545Average£711FlexibilityNo 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.