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Cheap flights from London to Portland from £315

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PDX
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Portland are usually found in September or February, booked 53 days in advance, depart on a Thursday or Wednesday and return on a Friday

Cheap flight deals from London to Portland

Enter your travel dates to find the best prices.

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 10 June 2026.

Sat 1/810:25
LHR
-
PDX
1 stop19h 21m
United Airlines
Wed 19/811:15
PDX
-
LHR
1 stop15h 55m
United Airlines
Deal found 10/6£825
Mon 15/619:35
LGW
-
PDX
2 stops50h 15m
Multiple Airlines
Sat 4/715:30
PDX
-
LGW
1 stop12h 15m
Multiple Airlines
Deal found 9/6£825
Wed 16/920:15
LCY
-
PDX
1 stop22h 55m
Multiple Airlines
Sun 20/913:05
PDX
-
LCY
1 stop11h 45m
Multiple Airlines
Deal found 9/6£826
Tue 7/717:40
LHR
-
PDX
2 stops23h 51m
Multiple Airlines
Thu 6/815:30
PDX
-
LHR
2 stops16h 10m
Multiple Airlines
Deal found 8/6£826
Mon 6/715:35
LGW
-
PDX
2 stops37h 11m
Condor
Mon 3/815:30
PDX
-
LGW
1 stop19h 20m
Condor
Deal found 9/6£826
Mon 15/619:30
LHR
-
PDX
2 stops29h 39m
Scandinavian Airlines
Tue 30/611:20
PDX
-
LHR
2 stops26h 20m
Scandinavian Airlines
Deal found 9/6£827
Thu 20/812:20
LGW
-
PDX
1 stop18h 12m
JetBlue
Sun 23/823:27
PDX
-
LGW
1 stop26h 08m
JetBlue
Deal found 10/6£828
Sun 5/718:40
LHR
-
PDX
2 stops35h 50m
SWISS
Sat 18/710:10
PDX
-
LHR
2 stops17h 40m
SWISS
Deal found 8/6£828
Mon 7/921:05
LHR
-
PDX
3 stops29h 36m
Scandinavian Airlines
Wed 16/907:00
PDX
-
LHR
2 stops18h 35m
Scandinavian Airlines
Deal found 7/6£829
Thu 9/717:40
LHR
-
PDX
2 stops23h 51m
Air Canada
Wed 22/719:45
PDX
-
LHR
3 stops28h 50m
Air Canada
Deal found 6/6£830
Fri 26/615:40
LGW
-
PDX
2 stops15h 50m
Icelandair
Sun 12/719:05
PDX
-
LGW
1 stop11h 35m
Icelandair
Deal found 6/6£830
Fri 26/615:00
LHR
-
PDX
1 stop16h 59m
American Airlines
Sat 11/719:30
PDX
-
LHR
Nonstop9h 30m
American Airlines
Deal found 9/6£831

Find 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 10 June 2026.

Round-trip from

£825

One-way from

£315

Popular in

July

Cheapest in

September

Average price

£844

Good round-trip deal

£768 or less

Good one-way deal

£668 or less
United Airlines
  • United Airlines
  • 1/8-19/8
  • 2 total stops
  • 35h 16m total
  • London to Portland
Search Deals
23/9
  • 23/9
  • 3 total stops
  • 48h 20m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£79 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Portland.
Search Deals
Price to beat on a one-way flight from London (LON) to Portland.
Search Deals

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 10 June 2026.
Use the filters below to find and compare flights from London to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 1/9

06:40-20:04

3 stops21h 24m

Portland

Tue 8/9

13:00-17:40

2 stops20h 40m

£829

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sat 4/7

12:15-00:50

1 stop20h 35m

Portland

Sun 12/7

19:30-13:00

Nonstop9h 30m

£831

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sat 4/7

12:30-21:00

1 stop16h 30m

Portland

Sat 18/7

19:30-13:00

Nonstop9h 30m

£831

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Fri 26/6

15:40-11:45

1 stop28h 05m

Portland

Sat 5/9

15:30-11:45

1 stop12h 15m

£833

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Wed 29/7

12:20-13:03

1 stop32h 43m

Portland

Fri 14/8

23:27-09:35

1 stop26h 08m

£860

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Fri 28/8

15:40-11:45

1 stop28h 05m

Portland

Sat 5/9

13:59-14:40

2 stops16h 41m

£863

LondonPortland

LCY - PDX

LCYPDX

London City

Tue 7/7

17:50-11:10

1 stop25h 20m

Portland

Tue 14/7

15:30-17:20

2 stops17h 50m

£869

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 7/7

14:45-00:50

1 stop18h 05m

Portland

Thu 6/8

19:30-13:00

Nonstop9h 30m

£869

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Wed 15/7

10:20-20:17

2 stops17h 57m

Portland

Sat 25/7

07:15-18:45

2 stops27h 30m

£871

LondonPortland

LTN - PDX

LTNPDX

London Luton

Sat 25/7

07:15-09:31

3 stops34h 16m

Portland

Sat 1/8

15:30-22:15

2 stops22h 45m

£872

Flights are sorted by cheapest return flights first.

Deals found on 8/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, April is the cheapest month in which you can book a flight from London to Portland (average of £276). Flying from London to Portland in August is currently the most expensive (average of £536). 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 10 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Portland as you normally would.

Weekly flight availability from London to Portland

Explore weekly flight availability from London to Portland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 10 June 2026.

The most flights from LON to PDX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

How much does it cost for a return flight from London to Portland?

What’s the top stopover airport for flights from London to Portland?

Share of one-stop return flights from London to Portland chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 47% of one-stop itineraries from London to Portland on Cheapflights.

What’s the cheapest stopover airport for flights from London to Portland?

Average return fare for one-stop flights from London to Portland, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £467.

What’s the fastest stopover option from London to Portland?

Shortest average travel time for one-stop one-way flights from London to Portland, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Vancouver (YVR) have the shortest average one-way travel time for one-stop routes: 12h 20m.

Which airport typically offers the quickest stopover for flights from London to Portland?

Average stopover duration for one-stop one-way flights from London to Portland, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Salt Lake City (SLC) offer the fastest connection on this route, with an average stopover time of 1h 12m.

How often are flights from London to Portland delayed?

About 21% of weekly flights between London and Portland have experienced delays in the past year, with the average delay time being 120 minutes.

What is the most punctual flight time for London to Portland flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Portland flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 21% of flights being delayed.

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

The best time to book flights from London to Portland is 77 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.

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 10 June 2026.
Read through reviews of airlines operating flights from London to Portland, such as Virgin Atlantic,American Airlines, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
American Airlines
7.1
Good
11,641 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
672 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,052 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,042 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Entertainment

7.5

Comfort

7.3

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 7 inbound flights from London per day from 10 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

  • How long is the flight from London to Portland?

    There are many flights that can get you from London to Portland in 20h 35m. Fly via Scandinavian Airlines, British Airways, or Icelandair to get the fastest option. There are 4896 mi between London and Portland. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Currently priced at £452, Icelandair will fly you from London to Portland and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Air Canada - these airlines can fly you to your destination from £491 and £496, respectively. Icelandair is 34% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 Stansted - 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 (77%), Alaska Airlines (77%), Aer Lingus (77%).

  • What are the cheapest flights from London to Portland?

    While on average a flight from London to Portland is generally £845, our data shows the cheapest flight currently is £540. When looking at the most popular route, (London Heathrow - Portland), you can expect to pay £596 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, April is the cheapest month in which you can book a flight from London to Portland (average of £276). Flying from London to Portland in August is currently the most expensive (average of £536). 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

Browse thousands of different options on Cheapflights for your next trip

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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 10 June 2026.
British Airways flights from London to Portland
Virgin Atlantic flights from London to Portland
Finnair flights from London to Portland

Top 10 airlines flying from London to Portland

Discover the top 10 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 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£452Average£635FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£491Average£643FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£496Average£736FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£500Average£831FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£513Average£720FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£515Average£602FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£542Average£718FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£542Average£803FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£560Average£854FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£783Average£974FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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