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Cheap flights from London to Portland, Maine from £530

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PWM
27 Feb — 6 Mar1
1 adult

The best prices from London to Portland are usually found in May or February, booked 63 days in advance, depart on a Monday or Thursday and return on a Monday

Cheap flight deals from London to Portland

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 February 2025.

Round-trip from

£598

One-way from

£530

Popular in

August

Cheapest in

May

Average price

£586
KLM
  • KLM
  • 21/3-28/3
  • 2 total stops
  • 36h 50m total
  • London to Portland
WestJet
  • WestJet
  • 27/4
  • 2 total stops
  • 37h 59m total
  • London to Portland
Highest demand for flights based on searches. 9% potential increase in price (£57 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in February 2025

Find flight deals from London to Portland

Cheapest flights from London to Portland
Explore the most affordable flight options available from London to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 February 2025.

Fri 21/316:35LHR - PWM
1 stop11h 40mKLM
Fri 28/315:00PWM - LHR
1 stop25h 10mKLM
Deal found 21/2£598
Sun 23/307:40LHR - PWM
2 stops20h 07mUnited Airlines
Sun 30/318:45PWM - LHR
1 stop31h 10mUnited Airlines
Deal found 21/2£600
Sun 23/318:00LHR - PWM
2 stops33h 15mLufthansa
Sun 30/318:45PWM - LHR
1 stop31h 10mLufthansa
Deal found 21/2£608
Fri 21/306:30LHR - PWM
2 stops21h 45mDelta
Fri 28/315:00PWM - LHR
1 stop25h 10mDelta
Deal found 21/2£611
Mon 7/420:55LHR - PWM
2 stops32h 04mVirgin Atlantic
Mon 14/405:20PWM - LHR
1 stop24h 50mVirgin Atlantic
Deal found 21/2£658
Tue 8/415:20LHR - PWM
1 stop13h 07mAustrian Airlines
Tue 15/406:15PWM - LHR
1 stop18h 40mAustrian Airlines
Deal found 21/2£708
Mon 7/406:40LHR - PWM
3 stops21h 30mMultiple Airlines
Mon 14/406:25PWM - LHR
3 stops30h 15mMultiple Airlines
Deal found 21/2£713
Mon 7/411:55LHR - PWM
1 stop16h 05mJetBlue
Mon 14/406:10PWM - LHR
1 stop9h 35mJetBlue
Deal found 21/2£714
Fri 21/306:40LHR - PWM
2 stops21h 35mScandinavian Airlines
Fri 28/315:00PWM - LHR
3 stops19h 35mScandinavian Airlines
Deal found 21/2£1,018
Fri 21/309:00LHR - PWM
3 stops18h 15mAir Canada
Fri 28/311:20PWM - LHR
3 stops19h 00mAir Canada
Deal found 21/2£1,032

Find flights from London to Portland within your budget

Customise your flight search to find flights from London 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 February 2025.

Fly from

London

Fly to

Portland

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 21/3

16:35-00:15

1 stop11h 40m

Portland

Fri 28/3

15:00-20:10

1 stop25h 10m

£598

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 23/3

07:40-23:47

2 stops20h 07m

Portland

Sun 30/3

18:45-06:55

1 stop31h 10m

£600

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 23/3

18:00-23:15

2 stops33h 15m

Portland

Sun 30/3

18:45-06:55

1 stop31h 10m

£608

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 21/3

06:30-00:15

2 stops21h 45m

Portland

Fri 28/3

15:00-20:10

1 stop25h 10m

£611

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 7/4

20:55-23:59

2 stops32h 04m

Portland

Mon 14/4

05:20-11:10

1 stop24h 50m

£658

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 8/4

15:20-23:27

1 stop13h 07m

Portland

Tue 15/4

06:15-05:55

1 stop18h 40m

£708

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 7/4

06:40-23:10

3 stops21h 30m

Portland

Mon 14/4

06:25-17:40

3 stops30h 15m

£713

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 7/4

11:55-23:00

1 stop16h 05m

Portland

Mon 14/4

06:10-20:45

1 stop9h 35m

£714

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 21/3

06:40-00:15

2 stops21h 35m

Portland

Fri 28/3

15:00-14:35

3 stops19h 35m

£1,018

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 21/3

09:00-23:15

3 stops18h 15m

Portland

Fri 28/3

11:20-10:20

3 stops19h 00m

£1,032

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 15 results
1
2

Best time to book a flight from London to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from London 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.

Travel insights for flights from London to Portland

Get recent, data-driven insights about flights from London to Portland including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London to Portland, Maine?

Use this chart to determine the optimal time to book a return flight from London to Portland. Price data was last updated on 14 February 2025.

The price you pay for your flight from London to Portland, Maine may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest time of day to fly from LON to PWM?

Find hourly flight availability from London 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 22 February 2025.

It’s typically best to fly out from London to Portland, Maine in the evening. Doing so could potentially save you 24% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Portland by month

Plan your trip to Portland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portland, Maine ranges from 73.0 - 115.0 inches per month. November is typically the wettest month, when rainfall can reach 115.0 mm. August is typically the driest time to visit Portland, Maine when rainfall is around 73.0 mm.

Temperature in Portland by month

Plan your trip to Portland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 February 2025.

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very Good

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from London 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?

    If you book a flight to Portland from London, you will be flying to Portland, which is the city’s only airport. Portland (PWM) is located 2.9 mi from the center of Portland. There are 0 flights from London to Portland per day from 4 different airlines.

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

    Currently priced at £598, KLM will fly you from London to Portland, Maine and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Lufthansa - these airlines can fly you to your destination from £600 and £608, respectively. KLM is 13% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapet airlines for a one-way flight from London to Portland, Maine are WestJet (£530), JetBlue (£908), and Austrian Airlines (£1,217).

  • Can I find deals for flights from London to Portland that include hotel bookings?

    Yes. In addition to deals on London to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Portland.

  • Can I find deals for business class flights from London to Portland?

    Yes. Cheapflights offers flight deals from London 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

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Top 4 airlines flying from London to Portland

Discover the top 4 airlines that operate flights from London 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 February 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£424Average£760FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Virgin AtlanticCheapest£498Average£680FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£508Average£675FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£555Average£747FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from London to Portland?

When you search for this flight from London to Portland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Portland?

Cheapflights helps you find that perfect flight to Portland from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Portland with no change fees?

Need flexible booking options for your flight to Portland from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Portland become cheaper?

Of course! You can now track prices for flights from London to Portland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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