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Cheap flights from London Heathrow Airport to Portland, Maine from £415

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
17 Dec — 24 Dec1
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 17 November 2025.

Mon 8/1210:15LHR - PWM
1 stop13h 00mMultiple Airlines
Mon 15/1212:39PWM - LHR
1 stop14h 11mMultiple Airlines
Deal found 15/11£618
Mon 8/1210:00LHR - PWM
2 stops18h 59mDelta
Mon 15/1216:53PWM - LHR
1 stop10h 52mDelta
Deal found 15/11£621
Tue 30/1212:50LHR - PWM
1 stop15h 32mLufthansa
Tue 6/119:27PWM - LHR
1 stop20h 53mLufthansa
Deal found 15/11£783
Tue 30/1215:50LHR - PWM
1 stop35h 53mMultiple Airlines
Tue 6/114:35PWM - LHR
2 stops18h 10mMultiple Airlines
Deal found 15/11£852
Fri 21/1109:40LHR - PWM
2 stops17h 39mKLM
Fri 28/1114:53PWM - LHR
1 stop12h 52mKLM
Deal found 15/11£916
Fri 21/1106:40LHR - PWM
2 stops22h 14mScandinavian Airlines
Fri 28/1106:35PWM - LHR
2 stops21h 45mScandinavian Airlines
Deal found 15/11£960
Mon 8/1206:40LHR - PWM
3 stops22h 19mScandinavian Airlines
Mon 15/1214:34PWM - LHR
3 stops21h 26mScandinavian Airlines
Deal found 15/11£1,427
Mon 17/1118:00LHR - PWM
2 stops28h 48mAir Canada
Fri 21/1119:47PWM - LHR
2 stops30h 23mAir Canada
Deal found 14/11£1,500

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 17 November 2025.

Round-trip from

£568

One-way from

£415

Popular in

December

Cheapest in

February

Average price

£561
United Airlines
  • United Airlines
  • 10/2-17/2
  • 3 total stops
  • 32h 15m total
  • London to Portland
Search Deals
4/12
  • 4/12
  • 3 total stops
  • 48h 46m 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 17 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

Tue 10/2

06:35-23:30

2 stops21h 55m

Portland

Tue 17/2

06:00-21:20

1 stop10h 20m

£568

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 10/2

08:55-22:29

1 stop18h 34m

Portland

Tue 17/2

05:31-08:05

2 stops21h 34m

£605

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 8/12

10:15-18:15

1 stop13h 00m

Portland

Mon 15/12

12:39-07:50

1 stop14h 11m

£618

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 8/12

10:00-23:59

2 stops18h 59m

Portland

Mon 15/12

16:53-08:45

1 stop10h 52m

£621

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 28/3

06:50-18:25

2 stops15h 35m

Portland

Tue 31/3

14:27-06:55

1 stop11h 28m

£861

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 30/12

19:25-18:26

2 stops28h 01m

Portland

Tue 6/1

19:27-20:35

2 stops44h 08m

£875

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 6/12

14:50-10:41

3 stops48h 51m

£428

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 3/12

14:50-10:41

3 stops48h 51m

£513

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 26/11

12:15-14:30

3 stops31h 15m

£532

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 7/12

12:15-09:06

3 stops25h 51m

£533

Flights are sorted by cheapest return flights first.

Deals found on 16/11

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 £322). Flying from London Heathrow Airport to Portland, Maine in July 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 17 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.

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 17 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
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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
1,411 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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
673 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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
9,015 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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
2,905 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

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?

    United Airlines and Virgin Atlantic can get you from London Heathrow Airport to Portland, Maine in just under 18h 34m. Your travel time can differ by up to 3h 21m. 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 (£391), JetBlue (£406), and Virgin Atlantic (£480) 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 £322). Flying from London Heathrow Airport to Portland, Maine in July 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 17 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£391Average£603FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£406Average£538FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Virgin AtlanticCheapest£480Average£630FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£481Average£628FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£510Average£632FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£523Average£939FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£567Average£751FlexibilityNo 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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