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Cheap flights from London to Portland from £334

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PDX
20 Jul — 27 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 Wednesday or Thursday 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 20 June 2026.

Tue 1/915:40
LGW
-
PDX
1 stop34h 15m
Icelandair
Sat 5/917:41
PDX
-
LGW
2 stops36h 59m
Icelandair
Deal found 19/6£722
Fri 21/817:40
LHR
-
PDX
2 stops28h 10m
Multiple Airlines
Sat 5/915:30
PDX
-
LHR
3 stops31h 05m
Multiple Airlines
Deal found 19/6£722
Tue 29/909:15
LCY
-
PDX
2 stops17h 51m
Multiple Airlines
Tue 6/1013:05
PDX
-
LCY
1 stop11h 45m
Multiple Airlines
Deal found 19/6£724
Tue 29/915:40
LHR
-
PDX
Nonstop10h 00m
British Airways
Tue 6/1019:30
PDX
-
LHR
Nonstop9h 30m
British Airways
Deal found 19/6£725
Wed 23/909:20
LCY
-
PDX
2 stops18h 56m
Virgin Atlantic
Thu 15/1015:10
PDX
-
LCY
2 stops18h 10m
Virgin Atlantic
Deal found 19/6£725
Thu 2/712:00
LHR
-
PDX
1 stop19h 53m
American Airlines
Sat 11/712:33
PDX
-
LHR
1 stop13h 47m
American Airlines
Deal found 19/6£726
Sun 5/712:20
LGW
-
PDX
1 stop32h 43m
JetBlue
Sat 18/723:27
PDX
-
LGW
1 stop26h 08m
JetBlue
Deal found 19/6£727
Tue 21/712:20
LGW
-
PDX
1 stop32h 43m
JetBlue
Thu 23/723:27
PDX
-
LGW
1 stop26h 08m
JetBlue
Deal found 18/6£728
Sat 4/708:40
LHR
-
PDX
1 stop21h 54m
JetBlue
Tue 14/714:16
PDX
-
LHR
1 stop32h 14m
JetBlue
Deal found 19/6£731
Thu 16/712:20
LGW
-
PDX
1 stop32h 43m
JetBlue
Wed 29/714:16
PDX
-
LGW
1 stop35h 19m
JetBlue
Deal found 19/6£731
Wed 8/709:30
LHR
-
PDX
2 stops18h 49m
United Airlines
Thu 16/715:30
PDX
-
LHR
1 stop13h 50m
United Airlines
Deal found 19/6£731
Sat 4/716:25
LHR
-
PDX
1 stop34h 16m
Finnair
Tue 14/719:30
PDX
-
LHR
Nonstop9h 30m
Finnair
Deal found 19/6£732

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 20 June 2026.

Round-trip from

£722

One-way from

£334

Popular in

July

Cheapest in

September

Average price

£854

Good round-trip deal

£775 or less

Good one-way deal

£743 or less
Icelandair
  • Icelandair
  • 1/9-5/9
  • 3 total stops
  • 71h 14m total
  • London to Portland
Search Deals
7/10
  • 7/10
  • 3 total stops
  • 48h 39m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£77 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 20 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

LGW - PDX

LGWPDX

London Gatwick

Tue 1/9

15:40-17:55

1 stop34h 15m

Portland

Sat 5/9

17:41-14:40

2 stops36h 59m

£722

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 1/7

14:05-00:50

2 stops18h 45m

Portland

Thu 9/7

05:00-05:55

2 stops16h 55m

£751

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sat 4/7

13:40-11:56

1 stop30h 16m

Portland

Mon 13/7

08:35-12:25

2 stops19h 50m

£754

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sat 5/9

15:40-17:40

Nonstop10h 00m

Portland

Wed 9/9

11:48-09:05

1 stop13h 17m

£757

LondonPortland

LCY - PDX

LCYPDX

London City

Wed 9/9

10:00-20:02

2 stops18h 02m

Portland

Fri 25/9

13:05-09:30

1 stop12h 25m

£797

LondonPortland

LTN - PDX

LTNPDX

London Luton

Thu 9/7

07:30-09:31

3 stops34h 01m

Portland

Thu 16/7

15:30-22:10

2 stops22h 40m

£806

LondonPortland

LTN - PDX

LTNPDX

London Luton

Mon 10/8

08:50-09:31

3 stops32h 41m

Portland

Mon 14/9

10:10-15:50

3 stops21h 40m

£814

LondonPortland

LTN - PDX

LTNPDX

London Luton

Wed 9/9

06:15-17:55

1 stop19h 40m

Portland

Fri 25/9

10:10-17:25

2 stops23h 15m

£829

LondonPortland

LTN - PDX

LTNPDX

London Luton

Thu 9/7

07:30-09:31

3 stops34h 01m

Portland

Wed 15/7

14:30-22:55

2 stops24h 25m

£839

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sat 4/7

12:30-21:00

1 stop16h 30m

Portland

Sat 11/7

11:46-12:15

1 stop16h 29m

£842

Flights are sorted by cheapest return flights first.

Deals found on 17/6

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 £279). Flying from London to Portland in August is currently the most expensive (average of £542). 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 20 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 20 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 44% 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 £472.

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 52 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 20 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
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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
690 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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
11,720 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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
680 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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
8,084 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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
8,059 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Boarding

7.7

Overall

7.5

Entertainment

7.5

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 10h. Fly via Icelandair, United Airlines, or British Airways 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 £458, 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 Finnair and Lufthansa - these airlines can fly you to your destination from £476 and £500, respectively. Icelandair is 35% 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 (70%), Alaska Airlines (70%), Aer Lingus (70%).

  • What are the cheapest flights from London to Portland?

    While on average a flight from London to Portland is generally £866, our data shows the cheapest flight currently is £676. When looking at the most popular route, (London Heathrow - Portland), you can expect to pay £576 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 £279). Flying from London to Portland in August is currently the most expensive (average of £542). 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 20 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 20 June 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£458Average£643FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
FinnairCheapest£476Average£864FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£500Average£651FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£502Average£731FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£521Average£652FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£522Average£728FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£548Average£721FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£548Average£799FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Alaska AirlinesCheapest£739Average£918FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Aer LingusCheapest£792Average£986FlexibilityNo 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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