Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Portland, Maine from £349

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
21 Apr — 28 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 22 March 2026.

Mon 20/408:15
LHR
-
PWM
1 stop19h 44m
JetBlue
Mon 27/407:30
PWM
-
LHR
1 stop32h 15m
JetBlue
Deal found 20/3£491
Mon 4/508:15
LHR
-
PWM
1 stop20h 21m
JetBlue
Mon 11/506:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 20/3£530
Tue 14/411:55
LHR
-
PWM
1 stop16h 04m
JetBlue
Tue 21/407:30
PWM
-
LHR
1 stop21h 00m
JetBlue
Deal found 17/3£534
Thu 16/411:55
LHR
-
PWM
1 stop16h 04m
JetBlue
Thu 23/407:30
PWM
-
LHR
1 stop32h 15m
JetBlue
Deal found 17/3£558
Wed 6/508:15
LHR
-
PWM
1 stop19h 48m
JetBlue
Wed 13/507:20
PWM
-
LHR
1 stop21h 10m
JetBlue
Deal found 22/3£560
Fri 17/411:55
LHR
-
PWM
1 stop16h 04m
JetBlue
Fri 24/407:30
PWM
-
LHR
1 stop32h 15m
JetBlue
Deal found 20/3£578
Tue 2/611:55
LHR
-
PWM
1 stop17h 01m
JetBlue
Wed 3/614:37
PWM
-
LHR
1 stop25h 08m
JetBlue
Deal found 22/3£582
Thu 3/908:15
LHR
-
PWM
1 stop20h 42m
JetBlue
Wed 7/1014:17
PWM
-
LHR
1 stop14h 13m
JetBlue
Deal found 18/3£588
Fri 1/511:55
LHR
-
PWM
1 stop16h 41m
JetBlue
Tue 5/506:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 17/3£590
Fri 1/508:15
LHR
-
PWM
1 stop20h 21m
JetBlue
Fri 8/506:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 17/3£593
Thu 30/411:55
LHR
-
PWM
1 stop16h 07m
JetBlue
Mon 4/506:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 18/3£606
Sun 3/511:55
LHR
-
PWM
1 stop16h 41m
JetBlue
Sun 10/506:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 19/3£608

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 22 March 2026.

Round-trip from

£491

One-way from

£349

Popular in

December

Cheapest in

February

Average price

£630
JetBlue
  • JetBlue
  • 20/4-27/4
  • 2 total stops
  • 51h 59m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 6/5
  • 1 total stop
  • 20h 21m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£33 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 22 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

Cheapest return flight

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 1/5

11:55-23:36

1 stop16h 41m

Portland

Tue 5/5

06:00-20:45

1 stop9h 45m

£590

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 1/5

08:15-23:36

1 stop20h 21m

Portland

Fri 8/5

06:00-20:45

1 stop9h 45m

£593
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 30/4

11:55-23:02

1 stop16h 07m

Portland

Mon 4/5

06:00-20:45

1 stop9h 45m

£606

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 16/4

07:05-00:46

2 stops22h 41m

Portland

Thu 23/4

14:51-18:30

2 stops22h 39m

£627

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 6/5

12:10-23:29

2 stops16h 19m

Portland

Wed 13/5

15:39-07:15

1 stop10h 36m

£645

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 16/4

12:10-23:28

2 stops16h 18m

Portland

Thu 23/4

06:00-21:20

1 stop10h 20m

£653

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 1/5

13:50-23:23

2 stops14h 33m

Portland

Tue 5/5

15:39-10:40

2 stops14h 01m

£655

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 3/5

06:40-00:46

3 stops23h 06m

Portland

Sun 10/5

06:25-16:25

2 stops29h 00m

£670

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 30/4

13:50-23:29

2 stops14h 39m

Portland

Mon 4/5

14:08-09:20

2 stops14h 12m

£675
Cheapest one-way

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 7/6

20:50-23:56

3 stops32h 06m

£444

Flights are sorted by cheapest return flights first.

Deals found on 17/3

Showing 1-10 of 16 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 £307). Flying from London Heathrow Airport to Portland, Maine in June is currently the most expensive (average of £375). 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 22 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
7.8
Good
1,475 reviews
Check prices

Comfort

7.6

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

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
7.8
Good
1,475 reviews
KLM
7.8
Good
1,475 reviews
Check prices

Comfort

7.6

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

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
682 reviews
KLM
7.8
Good
1,475 reviews
Check prices

Comfort

7.6

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

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
9,453 reviews
KLM
7.8
Good
1,475 reviews
Check prices

Comfort

7.6

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

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 3 different airlines.

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

    JetBlue and Scandinavian Airlines can get you from London Heathrow Airport to Portland, Maine in just under 16h 41m. Your travel time can differ by up to 6h. 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 (£474), KLM (£503), and United Airlines (£547) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that Virgin Atlantic is 31% 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 £307). Flying from London Heathrow Airport to Portland, Maine in June is currently the most expensive (average of £375). 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
Heathrow to Bangor flights
Southend to Boston flights

Top 3 airlines flying from Heathrow to Portland

Discover the top 3 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 22 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£474Average£556FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£503Average£624FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£547Average£747FlexibilityNo 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.