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$253+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find cheap flights from Portland to London with Cheapflights

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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 Tuesday and return on a Monday

Find 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 November 13, 2025.

This Gotogate deal was found by Cheapflights users on 11/10. 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.
Mon 11/242:45 pmPDX - LHR
1 stop12h 05mIcelandair
Sun 12/712:15 pmLHR - PDX
1 stop12h 45mIcelandair
Deal found 11/10$576
This KLM deal was found by Cheapflights users on 11/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/241:45 pmPDX - LHR
1 stop12h 15mKLM
Wed 12/36:30 amLHR - PDX
1 stop12h 55mKLM
Deal found 11/12$577
This Cheapflightsfares deal was found by Cheapflights users on 11/12. 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 11/242:45 pmPDX - LGW
1 stop12h 10mIcelandair
Wed 12/311:55 amLGW - PDX
1 stop13h 05mIcelandair
Deal found 11/12$579
This KLM deal was found by Cheapflights users on 11/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:45 pmPDX - LHR
1 stop12h 15mKLM
Wed 12/106:30 amLHR - PDX
1 stop12h 55mKLM
Deal found 11/10$580
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:35 amPDX - LHR
1 stop22h 30mDelta
Wed 12/36:30 amLHR - PDX
1 stop12h 55mDelta
Deal found 11/11$581
This Virgin Atlantic deal was found by Cheapflights users on 11/11. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/189:59 amPDX - LHR
2 stops14h 46mVirgin Atlantic
Tue 11/258:25 pmLHR - PDX
1 stop23h 00mVirgin Atlantic
Deal found 11/11$584
This Cheapflightsfares deal was found by Cheapflights users on 11/10. 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.
Wed 12/35:45 pmPDX - LHR
Nonstop9h 35mBritish Airways
Wed 12/1011:55 amLHR - PDX
1 stop17h 29mBritish Airways
Deal found 11/10$585
This Mytrip deal was found by Cheapflights users on 11/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:45 pmPDX - LGW
2 stops22h 15mMultiple Airlines
Sun 12/78:25 amLGW - PDX
2 stops16h 35mMultiple Airlines
Deal found 11/10$585
This Mytrip deal was found by Cheapflights users on 11/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:45 pmPDX - STN
2 stops19h 35mMultiple Airlines
Sun 12/76:30 amSTN - PDX
2 stops18h 30mMultiple Airlines
Deal found 11/10$587
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:45 pmPDX - LHR
1 stop12h 15mDelta
Tue 12/96:20 amLHR - PDX
2 stops17h 13mDelta
Deal found 11/10$589
This Cheapflightsfares deal was found by Cheapflights users on 11/11. 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.
Wed 12/32:07 pmPDX - LHR
1 stop13h 33mBritish Airways
Tue 12/911:55 amLHR - PDX
1 stop17h 29mBritish Airways
Deal found 11/11$591
This American Airlines deal was found by Cheapflights users on 11/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:45 pmPDX - LHR
Nonstop9h 35mAmerican Airlines
Fri 12/1211:55 amLHR - PDX
1 stop17h 29mAmerican Airlines
Deal found 11/13$592

Cheap 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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$561
(Cheapflightsfares)

One-way from

$253
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$660

Good round-trip deal

$707 or less

Good one-way deal

$501 or less
Provider with most accurate pricing for Portland-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London (LON) flights.
Search Deals
From Portland to London (LON)
Search Deals
One-way flight from Portland to London (LON)
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($237 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Portland to London (LON).
Search Deals
Price to beat on a one-way flight from Portland to London (LON).
Search Deals

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 November 13, 2025.
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

Wed 12/3

1:45 pm-10:00 am

1 stop12h 15m

London Heathrow

Wed 12/10

6:30 am-11:25 am

1 stop12h 55m

$581

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 11/26

1:45 pm-10:00 am

1 stop12h 15m

London Heathrow

Wed 12/3

6:30 am-11:25 am

1 stop12h 55m

$581

PortlandLondon

PDX - STN

PDXSTN

Portland

Mon 11/24

2:45 pm-6:20 pm

2 stops19h 35m

London Stansted

Sun 12/7

6:30 am-5:00 pm

2 stops18h 30m

$587

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 2/4

1:39 pm-10:00 am

1 stop12h 21m

London Heathrow

Wed 2/11

6:30 am-11:25 am

1 stop12h 55m

$588

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 12/1

12:32 am-7:05 am

1 stop22h 33m

London Heathrow

Tue 12/9

6:20 am-6:50 pm

2 stops20h 30m

$589

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/3

10:00 am-10:00 am

1 stop16h 00m

London Heathrow

Wed 2/18

6:30 am-11:25 am

1 stop12h 55m

$589

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/14

10:24 am-5:40 pm

2 stops23h 16m

London Heathrow

Thu 1/29

10:20 am-10:24 pm

2 stops20h 04m

$590

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 12/3

10:05 am-10:00 am

1 stop15h 55m

London Heathrow

Tue 12/9

6:20 am-5:43 pm

2 stops19h 23m

$590

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 12/3

10:05 am-10:00 am

1 stop15h 55m

London Heathrow

Wed 12/10

11:30 am-10:10 pm

2 stops18h 40m

$590

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 2/4

10:00 am-8:45 am

2 stops14h 45m

London Heathrow

Wed 2/11

6:30 am-11:25 am

1 stop12h 55m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 60 results
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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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-London flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 7, 2025.

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, October is the cheapest month in which you can book a flight from Portland to London (average of $525). Flying from Portland to London in June is currently the most expensive (average of $809). 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 November 13, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Portland to London by exploring options for tickets in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to London. Price data was last updated on December 16, 2024.

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

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

Share of 1-stop round-trip flights from Portland to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Vancouver (YVR) – chosen by Cheapflights users on 50% of 1-stop itineraries from Portland to London on Cheapflights.

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

Average round-trip fare for 1-stop flights from Portland to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $567.

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

Shortest average travel time for 1-stop one-way flights from Portland to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 12h 05m.

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

Average layover duration for 1-stop one-way flights from Portland to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Vancouver (YVR) offer the fastest connection on this route, with an average layover time of 3h 46m.

The best insider tips for Portland to London flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to London trip
Airports
PDX

Expect security wait times up to 30 minutes during rush hours. Use Express Lanes if eligible for faster processing.

Read more about PDXby Brandon Schultz
LHR

Take the Heathrow Express for the fastest route to central London, reaching Paddington Station quickly.

Read more about LHRby Ramsey Qubein
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz

Brandon Schultz

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.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

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.

Read more

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 November 13, 2025.
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.
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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.
American Airlines
7.2
Good
11,051 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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.
Icelandair
7.1
Good
578 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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.
Iberia
7.0
Good
3,012 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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.
British Airways
6.7
Okay
7,518 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Boarding

8.1

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 2 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?

    KLM, Delta, and Virgin Atlantic can get you from Portland to London in just under 12h 15m. Your travel time can differ by up to 10h 18m. 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 $493. Other airlines that can offer you cheap pricing are Delta, from $554, and KLM, from $561. 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 most popular routes from Portland to London?

    The most popular flight routes from Portland to London are Portland - London Heathrow, Portland - London Gatwick and Portland - London City.

  • 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 (76%), Alaska Airlines (76%) and Finnair (76%).

  • What are the cheapest flights from Portland to London?

    The cheapest flight price from Portland to London is $414. On average you can expect to pay $1,705. The most popular route, (Portland - London Heathrow), can usually be booked for $491.

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

    Portland to London flights have a layover in Reykjavik most often.

  • 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 $48 per day to make their sightseeing more efficient.

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

    Portland to London flights that have layovers will least frequently stop in Seattle.

  • 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, October is the cheapest month in which you can book a flight from Portland to London (average of $525). Flying from Portland to London in June is currently the most expensive (average of $809). 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
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Orpington
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Alternative routes for Portland to London

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Heathrow flights
Portland to Gatwick flights
Portland to London City flights
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Boise to London City flights
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Portland to Bristol flights
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Boise to Edinburgh flights
Eugene to Heathrow flights
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Eugene to Gatwick flights
Redmond to Gatwick flights
Medford to Manchester flights
Boise to Birmingham flights
Portland to Leeds flights
Eugene to London City flights
Redmond to Southampton flights
Portland to Southend flights

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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$493Average$760FlexibilityNo cancel feeOn-time76%
DeltaCheapest$554Average$874FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$561Average$669FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$567Average$778FlexibilityNo cancel feeOn-time72%
IberiaCheapest$577Average$789FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$593Average$847FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$600Average$1,408FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$619Average$911FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$632Average$897FlexibilityNo cancel feeOn-time71%
FinnairCheapest$641Average$940FlexibilityNo cancel feeOn-time76%

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