Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Portland, Maine from £364

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
5 Jan — 12 Jan1
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 6 December 2025.

Thu 4/1212:05LHR - PWM
1 stop11h 49mUnited Airlines
Mon 8/1219:46PWM - LHR
1 stop10h 19mUnited Airlines
Deal found 3/12£1,059
Thu 4/1213:25LHR - PWM
2 stops29h 13mAir Canada
Mon 8/1206:00PWM - LHR
2 stops33h 35mAir Canada
Deal found 3/12£1,062
Fri 19/1207:00LHR - PWM
2 stops21h 59mUnited Airlines
Mon 22/1216:10PWM - LHR
1 stop34h 45mUnited Airlines
Deal found 5/12£1,249

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 6 December 2025.

Round-trip from

£565

One-way from

£364

Popular in

December

Cheapest in

February

Average price

£1,171
United Airlines
  • United Airlines
  • 4/3-11/3
  • 4 total stops
  • 31h 36m total
  • London to Portland
Search Deals
31/1
  • 31/1
  • 3 total stops
  • 52h 12m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£70 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£36 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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 6 December 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

Wed 4/3

07:30-18:56

2 stops16h 26m

Portland

Wed 11/3

11:30-06:40

2 stops15h 10m

£565

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 19/1

07:30-18:52

2 stops16h 22m

Portland

Mon 26/1

14:31-09:10

2 stops13h 39m

£568

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 22/1

06:35-18:52

2 stops17h 17m

Portland

Mon 26/1

15:12-10:50

2 stops14h 38m

£596

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 18/1

07:30-18:52

2 stops16h 22m

Portland

Sun 25/1

16:10-07:55

1 stop34h 45m

£602

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 31/1

09:55-09:07

3 stops52h 12m

£364

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/2

06:50-09:07

3 stops31h 17m

£397

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 4/2

16:10-12:05

2 stops24h 55m

£401

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 3/2

16:10-15:31

2 stops28h 21m

£401

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 3/2

10:15-22:54

1 stop17h 39m

£401

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/2

08:55-00:20

1 stop20h 25m

£421

Flights are sorted by cheapest return flights first.

Deals found on 6/12

Showing 1-10 of 16 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 £326). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of £376). 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 6 December 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.

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 6 December 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
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Finnair
7.6
Good
1,334 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,072 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
JetBlue
7.2
Good
2,896 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Overall

7.7

Boarding

7.8

Entertainment

7.1

Food

7.2

Comfort

7.6

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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?

    United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 26m. 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 (£401), Virgin Atlantic (£474), and Finnair (£475) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that JetBlue is 39% 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 £326). Flying from London Heathrow Airport to Portland, Maine in July is currently the most expensive (average of £376). 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
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 6 December 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£401Average£531FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Virgin AtlanticCheapest£474Average£622FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£475Average£620FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£493Average£647FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£503Average£624FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£516Average£927FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£560Average£741FlexibilityNo 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.