London

$250+ Cheap flights from Portland (PDX) to London (LON)

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Mar 2 — Mar 91
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Find cheap flights from Portland to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Portland to London are usually found in October or November, booked 46 days in advance, depart on a Sunday or Monday and return on a Saturday

Cheap flight deals from Portland to London

Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 31, 2026.

This KAYAK deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/43:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Fri 4/241:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 1/30$599
This oojo deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/163:45 pm
PDX
-
LGW
1 stop12h 10m
Icelandair
Tue 4/73:40 pm
LGW
-
PDX
1 stop34h 20m
Icelandair
Deal found 1/29$599
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/29:50 am
PDX
-
LHR
1 stop18h 00m
Lufthansa
Wed 3/188:45 am
LHR
-
PDX
2 stops22h 50m
Lufthansa
Deal found 1/30$600
This oojo deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:30 pm
PDX
-
LGW
1 stop15h 10m
Icelandair
Tue 4/213:40 pm
LGW
-
PDX
1 stop34h 20m
Icelandair
Deal found 1/30$600
This oojo deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Wed 8/199:25 pm
LHR
-
PDX
1 stop22h 20m
Icelandair
Deal found 1/29$602
This oojo deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 4/79:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 1/29$603
This KAYAK deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Fri 5/81:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 1/28$605
This FlightHub deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Wed 4/221:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 1/30$607
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:30 pm
PDX
-
LGW
1 stop15h 10m
Icelandair
Thu 9/33:40 pm
LGW
-
PDX
1 stop34h 15m
Icelandair
Deal found 1/29$609
This Gotogate deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/110:05 am
PDX
-
LHR
2 stops40h 05m
Multiple Airlines
Tue 11/106:35 am
LHR
-
PDX
2 stops34h 50m
Multiple Airlines
Deal found 1/28$610
This KAYAK deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:30 pm
PDX
-
LGW
1 stop12h 15m
Icelandair
Sun 5/103:40 pm
LGW
-
PDX
1 stop34h 20m
Icelandair
Deal found 1/28$611
This Gotogate deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:40 pm
PDX
-
LHR
1 stop33h 40m
Multiple Airlines
Wed 10/286:30 am
LHR
-
PDX
2 stops19h 00m
Multiple Airlines
Deal found 1/28$612

Find flight deals from Portland to London

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to London (LON). 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 January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$599
(KAYAK)

One-way from

$250
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$720

Good round-trip deal

$658 or less

Good one-way deal

$370 or less
Provider with most accurate pricing for Portland-London (LON) flight deals.
Provider most trusted by Cheapflights users for Portland-London (LON) flights.
From Portland to London (LON)
One-way flight from Portland to London (LON)
Highest demand for flights based on searches. 21% potential increase in price ($214 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Average for round-trip flights in January 2026
Price to beat on a round-trip flight from Portland to London (LON).
Price to beat on a one-way flight from Portland to London (LON).

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to London 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 2,558,603 searches. Data last updated January 31, 2026.
Use the filters below to find and compare flights from Portland to London that are best for you.

Fly from

Portland

Fly to

London

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 5/1

10:45 am-12:10 pm

1 stop17h 25m

London Heathrow

Wed 5/6

8:40 am-11:10 am

1 stop34h 30m

$640

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/17

8:30 am-11:15 am

2 stops19h 45m

London Heathrow

Tue 3/24

7:30 am-11:04 pm

2 stops22h 34m

$649

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/13

7:32 pm-3:35 pm

1 stop12h 03m

London Heathrow

Thu 4/30

6:30 am-6:52 pm

2 stops20h 22m

$649

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/24

6:05 am-7:05 am

1 stop18h 00m

London Heathrow

Wed 4/1

8:40 am-8:25 pm

2 stops19h 45m

$650

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/17

11:10 pm-7:10 am

2 stops25h 00m

London Heathrow

Tue 3/31

11:05 am-8:42 pm

2 stops41h 37m

$651

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 3/14

11:59 pm-5:55 am

1 stop22h 56m

London Heathrow

Wed 3/25

10:25 am-7:14 pm

1 stop15h 49m

$662

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/17

7:00 am-5:55 am

1 stop15h 55m

London Heathrow

Thu 3/26

11:35 am-9:10 pm

1 stop16h 35m

$662

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/1

12:50 pm-9:40 am

1 stop12h 50m

London Heathrow

Wed 4/8

3:05 pm-9:15 am

1 stop26h 10m

$670

PortlandLondon

PDX - LTN

PDXLTN

Portland

Mon 3/9

3:45 pm-5:10 pm

2 stops18h 25m

London Luton

Mon 3/23

7:20 am-6:00 pm

2 stops17h 40m

$674

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/1

5:00 am-6:45 am

2 stops17h 45m

London Heathrow

Thu 4/9

3:00 pm-9:15 am

1 stop26h 15m

$674

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 60 results
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6

Compare providers for flights from Portland to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to London in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to London

Have a flexible travel schedule? Discover the best time to fly to London from Portland with our price prediction graph.
Estimated round-trip 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 Portland to London

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to London. Price data was last updated on January 30, 2026.

The price you pay for your flight from Portland to London may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, March is the cheapest month in which you can book a flight from Portland to London (average of $491). Flying from Portland to London in June is currently the most expensive (average of $823). 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 PDX to LON?

Find hourly flight availability from Portland to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 31, 2026.

When flying from Portland to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

The best insider tips for Portland to London flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to London trip
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated January 31, 2026.
See what other customers who have flown with Delta, American Airlines, and Icelandair from Portland to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Portland to London. 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 from for flights from Portland to London?

    For a flight from Portland to London, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city. Portland is the only Portland airport and it handles 0 outbound flights to London per day. 13 airlines have flights to London from Portland on a regular basis.

  • How long is the flight from Portland to London?

    Delta, United Airlines, and Virgin Atlantic can get you from Portland to London in just under 17h 01m. Your travel time can differ by up to 2h 54m. There are 4896 mi between Portland and London. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Portland to London round-trip from $486. Other airlines that can offer you cheap pricing are Delta, from $551, and Virgin Atlantic, from $558. You may be able to fly from Portland to London for 39% less than the average price by searching for these airlines.

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

    The cheapest airlines for a one-way flight from Portland to London are Icelandair ($192), Virgin Atlantic ($378), and Air Canada ($394).

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

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

    The top 3 most reliable airlines when flying from Portland to London are American Airlines (77%), Alaska Airlines (77%) and Aer Lingus (77%).

  • What are the cheapest flights from Portland to London?

    The cheapest flight price from Portland to London is $259. On average you can expect to pay $1,374. The most popular route, (Portland - London Heathrow), can usually be booked for $508.

  • Where are the most common layover locations when flying from Portland to London?

  • What are some popular things to do or see while on a layover in Reykjavik?

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Travelers on a layover in Reykjavik can visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool, by traveling 23.2 mi, 23.3 mi, and 24.6 mi, respectively after landing at Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $52 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Portland to London flights?

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland to London 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 Portland to London?

    Currently, March is the cheapest month in which you can book a flight from Portland to London (average of $491). Flying from Portland to London in June is currently the most expensive (average of $823). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Hayes
Borehamwood
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Chipping Norton
Horley
Kingston upon Thames
Eastbourne
Sutton

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portland to London

Discover the top 10 airlines that operate flights from Portland to London. 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 2,558,603 searches. Data last updated January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$486Average$745FlexibilityNo cancel feeOn-time76%
DeltaCheapest$551Average$843FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$558Average$721FlexibilityNo cancel feeOn-time72%
KLMCheapest$561Average$646FlexibilityNo cancel feeOn-time75%
IberiaCheapest$574Average$807FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$580Average$830FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$582Average$1,101FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$607Average$973FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$628Average$891FlexibilityNo cancel feeOn-time71%
FinnairCheapest$641Average$978FlexibilityNo cancel feeOn-time76%

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