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Cheap flights from London to Portland from £270

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PDX
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Portland are usually found in September or March, booked 53 days in advance, depart on a Wednesday or Thursday 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 27 November 2025.

Round-trip from

£558

One-way from

£270

Popular in

July

Cheapest in

September

Average price

£631

Good round-trip deal

£673 or less
Icelandair
  • Icelandair
  • 21/4-12/5
  • 2 total stops
  • 49h 15m total
  • London to Portland
Search Deals
17/3
  • 17/3
  • 3 total stops
  • 37h 06m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£80 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Portland.
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Find 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 27 November 2025.

Mon 8/1210:15LHR - PDX
1 stop16h 55mBritish Airways
Wed 24/1217:45PDX - LHR
Nonstop9h 35mBritish Airways
Deal found 25/11£573
Thu 11/1210:15LHR - PDX
1 stop16h 56mBritish Airways
Thu 22/114:18PDX - LHR
1 stop13h 57mBritish Airways
Deal found 26/11£603
Mon 8/1212:35LHR - PDX
2 stops18h 48mAmerican Airlines
Wed 24/1217:45PDX - LHR
Nonstop9h 35mAmerican Airlines
Deal found 25/11£617
Thu 4/1210:05LHR - PDX
1 stop17h 06mFinnair
Sat 13/1214:07PDX - LHR
1 stop32h 43mFinnair
Deal found 26/11£626
Thu 11/1206:40LHR - PDX
2 stops24h 16mScandinavian Airlines
Thu 22/107:00PDX - LHR
2 stops26h 40mScandinavian Airlines
Deal found 25/11£630
Wed 24/1216:30LHR - PDX
1 stop33h 32mBritish Airways
Mon 2/212:35PDX - LHR
1 stop13h 25mBritish Airways
Deal found 25/11£631
Wed 10/1207:50LHR - PDX
2 stops17h 10mMultiple Airlines
Sat 10/119:00PDX - LHR
3 stops33h 50mMultiple Airlines
Deal found 26/11£650
Thu 11/1206:30LHR - PDX
2 stops20h 00mMultiple Airlines
Thu 22/115:15PDX - LHR
1 stop12h 35mMultiple Airlines
Deal found 26/11£653
Wed 10/1213:45LHR - PDX
Nonstop10h 10mAmerican Airlines
Sun 11/117:45PDX - LHR
Nonstop9h 35mAmerican Airlines
Deal found 26/11£656
Wed 10/1213:45LHR - PDX
Nonstop10h 10mBritish Airways
Sun 11/112:35PDX - LHR
1 stop15h 05mBritish Airways
Deal found 26/11£657
Wed 10/1211:55LGW - PDX
1 stop13h 05mIcelandair
Sun 11/107:10PDX - LGW
2 stops19h 45mIcelandair
Deal found 26/11£699
Wed 10/1211:55LGW - PDX
1 stop13h 05mIcelandair
Sat 10/113:38PDX - LGW
2 stops37h 17mIcelandair
Deal found 26/11£703

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 27 November 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

Mon 27/4

15:40-17:40

Nonstop10h 00m

Portland

Mon 11/5

14:15-12:10

1 stop13h 55m

£586

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 4/5

15:40-17:40

Nonstop10h 00m

Portland

Mon 18/5

09:30-06:50

1 stop13h 20m

£590

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 21/4

13:00-20:54

1 stop15h 54m

Portland

Tue 12/5

19:30-13:00

Nonstop9h 30m

£590

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 11/3

07:30-21:10

2 stops20h 40m

Portland

Thu 26/3

07:00-07:30

1 stop17h 30m

£593

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Thu 11/12

10:15-19:11

1 stop16h 56m

Portland

Thu 22/1

14:18-12:15

1 stop13h 57m

£603

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Fri 16/1

10:05-18:51

1 stop16h 46m

Portland

Wed 28/1

12:35-10:00

1 stop13h 25m

£608

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sun 15/3

19:15-23:07

2 stops34h 52m

Portland

Thu 26/3

13:57-11:40

1 stop14h 43m

£612

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 13/4

15:40-17:40

Nonstop10h 00m

Portland

Sat 16/5

14:15-12:10

1 stop13h 55m

£616

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sun 15/3

08:40-12:25

1 stop34h 45m

Portland

Wed 25/3

05:19-10:30

1 stop22h 11m

£617

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 11/3

13:45-16:55

Nonstop10h 10m

Portland

Thu 26/3

05:40-11:40

1 stop23h 00m

£620

Flights are sorted by cheapest return flights first.

Deals found on 26/11

Showing 1-10 of 60 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 November 2025.

The best time to book flights from London to Portland is 53 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, December is the cheapest month in which you can book a flight from London to Portland (average of £447). Flying from London to Portland in July is currently the most expensive (average of £568). 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 27 November 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 evening, which can drop the price by up to 17% 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 16 December 2024.

Travellers seeking maximum savings on their London to Portland flight should consider departing on Thursday at midday 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.

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.

Calgary (YYC) is the most affordable one-stop option, with an average return flight price of £478.

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 04m.

How often are flights from London to Portland delayed?

About 22% of weekly flights between London and Portland have experienced delays in the past year, with the average delay time being 118 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?

Monday 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 22% of flights being delayed.

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 27 November 2025.
Read through reviews of airlines operating flights from London to Portland, such as Finnair, Virgin Atlantic, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Virgin Atlantic
7.5
Good
675 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.0
Good
581 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,594 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,539 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 2 inbound flights from London per day from 11 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 British Airways, United Airlines, or Delta 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 £435, 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 Air Canada and Finnair - these airlines can fly you to your destination from £505 and £510, 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 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 (58%), Alaska Airlines (58%), Finnair (58%).

  • What are the cheapest flights from London to Portland?

    While on average a flight from London to Portland is generally £1,010, our data shows the cheapest flight currently is £627. When looking at the most popular route, (London Heathrow - Portland), you can expect to pay £549 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, December is the cheapest month in which you can book a flight from London to Portland (average of £447). Flying from London to Portland in July is currently the most expensive (average of £568). 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Cannon Beach
Lincoln City

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 27 November 2025.
British Airways flights from London to Portland
Finnair flights from London to Portland
Virgin Atlantic 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 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£435Average£595FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£505Average£640FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£510Average£614FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£513Average£624FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£514Average£683FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£520Average£666FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£522Average£617FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£530Average£814FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£549Average£702FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest£582Average£753FlexibilityNo cancel feeOn-time77%
Search Iberia 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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