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Cheap flights from London to Portland from £377

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PDX
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from London to Portland are usually found in March or February, booked 63 days in advance, depart on a Tuesday or Wednesday and return on a Friday

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 (PDX). 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 25 March 2025.

Round-trip from

£534

One-way from

£377

Popular in

August

Cheapest in

March

Average price

£593

Good round-trip deal

£627 or less

Good one-way deal

£862 or less
Air Canada
  • Air Canada
  • 15/5-19/5
  • 3 total stops
  • 51h 45m total
  • London to Portland
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28/4
  • 28/4
  • 2 total stops
  • 27h 48m total
  • London to Portland
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Highest demand for flights based on searches. 14% potential increase in price (£89 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London (LON) to Portland.
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Price to beat on a one-way flight from London (LON) to Portland.
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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 25 March 2025.

Thu 15/508:40LHR - PDX
2 stops18h 05mAir Canada
Mon 19/519:40PDX - LHR
1 stop33h 40mAir Canada
Deal found 24/3£534
Thu 8/508:40LHR - PDX
2 stops20h 13mUnited Airlines
Thu 15/513:45PDX - LHR
1 stop16h 25mUnited Airlines
Deal found 24/3£538
Tue 22/419:15LHR - PDX
1 stop24h 05mVirgin Atlantic
Tue 20/507:14PDX - LHR
1 stop20h 11mVirgin Atlantic
Deal found 24/3£539
Mon 21/414:10LHR - PDX
1 stop12h 15mMultiple Airlines
Sun 27/410:10PDX - LHR
2 stops17h 40mMultiple Airlines
Deal found 24/3£541
Mon 21/406:30LHR - PDX
2 stops18h 57mLufthansa
Sun 27/410:10PDX - LHR
2 stops17h 40mLufthansa
Deal found 24/3£551
Fri 2/508:55LCY - PDX
2 stops23h 36mMultiple Airlines
Mon 5/507:54PDX - LCY
2 stops20h 36mMultiple Airlines
Deal found 24/3£562
Fri 2/510:55LGW - PDX
1 stop20h 47mMultiple Airlines
Mon 5/513:45PDX - LGW
2 stops22h 55mMultiple Airlines
Deal found 24/3£563
Wed 14/506:30LHR - PDX
1 stop12h 50mDelta
Mon 19/515:30PDX - LHR
1 stop11h 50mDelta
Deal found 24/3£565
Mon 21/415:40LHR - PDX
Nonstop9h 55mFinnair
Mon 5/513:55PDX - LHR
1 stop14h 50mFinnair
Deal found 25/3£571
Mon 28/415:40LHR - PDX
Nonstop9h 55mAmerican Airlines
Mon 12/515:24PDX - LHR
1 stop12h 51mAmerican Airlines
Deal found 23/3£572
Fri 2/515:40LHR - PDX
Nonstop9h 55mBritish Airways
Mon 5/519:25PDX - LHR
Nonstop9h 35mBritish Airways
Deal found 24/3£580
Fri 5/915:40LGW - PDX
1 stop34h 15mIcelandair
Sat 20/915:20PDX - LGW
1 stop15h 20mIcelandair
Deal found 25/3£588

Cheapflights Fare Finder

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 25 March 2025.
Use the filters below to find and compare flights from London to Portland that are best for you.

Fly from

London

Fly to

Portland

Route

Depart

Return

Price

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Thu 15/5

08:40-18:45

2 stops18h 05m

Portland

Mon 19/5

19:40-13:20

1 stop33h 40m

£534

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Thu 8/5

08:40-20:53

2 stops20h 13m

Portland

Thu 15/5

13:45-14:10

1 stop16h 25m

£538

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 22/4

19:15-11:20

1 stop24h 05m

Portland

Tue 20/5

07:14-11:25

1 stop20h 11m

£539

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 21/4

14:10-18:25

1 stop12h 15m

Portland

Sun 27/4

10:10-11:50

2 stops17h 40m

£541

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 21/4

06:30-17:27

2 stops18h 57m

Portland

Sun 27/4

10:10-11:50

2 stops17h 40m

£551

LondonPortland

LCY - PDX

LCYPDX

London City

Fri 2/5

08:55-00:31

2 stops23h 36m

Portland

Mon 5/5

07:54-12:30

2 stops20h 36m

£562

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Fri 2/5

10:55-23:42

1 stop20h 47m

Portland

Mon 5/5

13:45-20:40

2 stops22h 55m

£563

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 14/5

06:30-11:20

1 stop12h 50m

Portland

Mon 19/5

15:30-11:20

1 stop11h 50m

£565

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 21/4

15:40-17:35

Nonstop9h 55m

Portland

Mon 5/5

13:55-12:45

1 stop14h 50m

£571

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 28/4

15:40-17:35

Nonstop9h 55m

Portland

Mon 12/5

15:24-12:15

1 stop12h 51m

£572

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 55 results
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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.

Cheapflights Insights

Everything you need to know about your flight from London to Portland

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

Use this chart to determine the optimal time to book a return flight from London to Portland. Price data was last updated on 21 March 2025.

The best time to book flights from London to Portland is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to Portland?

Currently, January is the cheapest month in which you can book a flight from London to Portland (average of £736). Flying from London to Portland in July is currently the most expensive (average of £1,048). 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 LON to PDX?

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 25 March 2025.

When flying from London to Portland, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 20% versus a flight in the afternoon.

What is the cheapest day to fly from London to Portland?

Use this chart to determine the cheapest time to fly return from London to Portland. Price data was last updated on 20 October 2024.

Travellers seeking maximum savings on their London to Portland flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 ranges from 18.0 - 142.0 inches per month. November is typically the wettest month, when rainfall can reach 142.0 mm. July is typically the driest time to visit Portland when rainfall is around 18.0 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, 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 21.0 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 25 March 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London 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
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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?

    Most people fly into Portland (PDX) if they book a flight to Portland from London. On average, Portland has 1 inbound flight from London per day from 9 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

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

    Currently priced at £534, Air Canada will fly you from London to Portland and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Virgin Atlantic - these airlines can fly you to your destination from £538 and £539, respectively. Air Canada is 22% 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 one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as £395. Users have also found prices from £460 and £561 on Icelandair and Lufthansa, respectively.

  • What are the most popular routes from London to Portland?

    The most popular route from London to Portland is London Heathrow - Portland. You may also consider London Gatwick - Portland or London City - Portland.

  • What are the most reliable airlines from London to Portland?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Portland on time: American Airlines (67%), Alaska Airlines (67%), Aer Lingus (67%).

  • What are the cheapest flights from London to Portland?

    While on average a flight from London to Portland is generally £1,622, our data shows the cheapest flight currently is £538. When looking at the most popular route, (London Heathrow - Portland), you can expect to pay £445 for that flight.

  • 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.

  • What is the cheapest month to book a flight from London to Portland?

    Currently, January is the cheapest month in which you can book a flight from London to Portland (average of £736). Flying from London to Portland in July is currently the most expensive (average of £1,048). 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

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Fly from London to Portland on these airlines

Choose from the following airlines for your flight from London to Portland. Flights are based on user searches made on Cheapflights and were last updated on 25 March 2025.
British Airways flights from London to Portland
Finnair flights from London to Portland
Virgin Atlantic flights from London to Portland

Top 9 airlines flying from London to Portland

Discover the top 9 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£460Average£689FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
FinnairCheapest£512Average£643FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£526Average£689FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£534Average£648FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£536Average£734FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£539Average£656FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£540Average£632FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£557Average£813FlexibilityNo cancel feeOn-time77%
Search Iberia flights
KLMCheapest£576Average£731FlexibilityNo cancel feeOn-time75%
Search KLM 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 London to Portland?

Cheapflights helps you search for flights from London to Portland via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Portland, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on London to Portland flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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