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Cheap flights from London Heathrow Airport to Portland, Maine from £372

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
16 Jul — 23 Jul1
1 adult

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 11 July 2025.

Round-trip from

£372

Popular in

December

Cheapest in

February

Average price

£863
Icelandair
  • Icelandair
  • 9/8-16/8
  • 3 total stops
  • 60h 42m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£10 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Heathrow to Portland

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 11 July 2025.

Sat 9/811:55LHR - PWM
1 stop17h 22mIcelandair
Sat 16/806:10PWM - LHR
2 stops43h 20mIcelandair
Deal found 10/7£372
Thu 11/911:55LHR - PWM
1 stop15h 07mJetBlue
Mon 15/914:17PWM - LHR
1 stop14h 13mJetBlue
Deal found 10/7£403
Thu 11/909:55LHR - PWM
2 stops19h 16mDelta
Mon 15/917:00PWM - LHR
2 stops15h 30mDelta
Deal found 10/7£539
Mon 25/808:30LHR - PWM
2 stops15h 59mUnited Airlines
Mon 1/919:26PWM - LHR
1 stop30h 29mUnited Airlines
Deal found 10/7£621
Sat 9/809:40LHR - PWM
2 stops17h 26mVirgin Atlantic
Sat 16/806:00PWM - LHR
2 stops19h 25mVirgin Atlantic
Deal found 10/7£649
Thu 11/914:05LHR - PWM
2 stops13h 58mMultiple Airlines
Mon 15/910:39PWM - LHR
3 stops17h 56mMultiple Airlines
Deal found 11/7£834
Thu 11/908:30LHR - PWM
3 stops19h 33mAir Canada
Mon 15/910:39PWM - LHR
3 stops17h 56mAir Canada
Deal found 11/7£839
Sat 23/812:30LHR - PWM
1 stop13h 06mFinnair
Sat 30/812:14PWM - LHR
2 stops14h 06mFinnair
Deal found 9/7£889
Sat 23/806:40LHR - PWM
3 stops23h 08mScandinavian Airlines
Sat 30/806:31PWM - LHR
2 stops22h 04mScandinavian Airlines
Deal found 8/7£1,025

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 11 July 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

Sat 9/8

11:55-00:17

1 stop17h 22m

Portland

Sat 16/8

06:10-06:30

2 stops43h 20m

£372

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

11:55-22:02

1 stop15h 07m

Portland

Mon 15/9

14:17-09:30

1 stop14h 13m

£403

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

09:55-00:11

2 stops19h 16m

Portland

Mon 15/9

17:00-13:30

2 stops15h 30m

£539

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 25/8

08:30-19:29

2 stops15h 59m

Portland

Mon 1/9

19:26-06:55

1 stop30h 29m

£621

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 9/8

09:40-22:06

2 stops17h 26m

Portland

Sat 16/8

06:00-06:25

2 stops19h 25m

£649

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

14:05-23:03

2 stops13h 58m

Portland

Mon 15/9

10:39-09:35

3 stops17h 56m

£834

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

08:30-23:03

3 stops19h 33m

Portland

Mon 15/9

10:39-09:35

3 stops17h 56m

£839

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 23/8

12:30-20:36

1 stop13h 06m

Portland

Sat 30/8

12:14-07:20

2 stops14h 06m

£889

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 23/8

06:40-00:48

3 stops23h 08m

Portland

Sat 30/8

06:31-09:35

2 stops22h 04m

£1,025

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 16/8

21:25-17:25

2 stops49h 00m

£488

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 14 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 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 11 July 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 34% 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 11 July 2025.
Check out reviews from past customers who have flown with Delta, 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.
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,312 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,848 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
JetBlue
7.3
Good
2,913 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

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

    According to our current data, Icelandair (£372), JetBlue (£403), and Delta (£539) offers the cheapest pricing from London Heathrow Airport to Portland, Maine. Users have found that Icelandair is 43% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Portland, Maine one-way?

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as £595. However, be on the lookout for offers from WestJet and Scandinavian Airlines, as they are both options that can get you from London Heathrow Airport to Portland, Maine for a low price.

  • 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport 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
Heathrow to Bangor flights
Southend to Boston 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£379Average£584FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£395Average£596FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Virgin AtlanticCheapest£464Average£635FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£466Average£587FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£477Average£612FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£506Average£910FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£549Average£727FlexibilityNo 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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