London

$241+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Mar 13 — Mar 201
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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 April, booked 46 days in advance, depart on a Tuesday or Wednesday 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 February 11, 2026.

This Icelandair deal was found by Cheapflights users on 2/8. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:05 pm
PDX
-
LHR
1 stop32h 50m
Icelandair
Tue 8/259:25 pm
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 2/8$596
This oojo deal was found by Cheapflights users on 2/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Wed 4/291:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 2/11$599
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/113:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Wed 4/221:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 2/10$600
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/113:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Sun 4/199:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 2/10$601
This Mytrip deal was found by Cheapflights users on 2/9. 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.
Sat 4/113:30 pm
PDX
-
STN
2 stops23h 45m
Multiple Airlines
Sat 4/2510:00 pm
STN
-
PDX
3 stops43h 10m
Multiple Airlines
Deal found 2/9$601
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/113:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Thu 4/169:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 2/10$602
This Mytrip deal was found by Cheapflights users on 2/10. 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.
Tue 5/193:30 pm
PDX
-
STN
2 stops24h 40m
Multiple Airlines
Wed 6/37:00 am
STN
-
PDX
2 stops18h 55m
Multiple Airlines
Deal found 2/10$603
This Justfly.com deal was found by Cheapflights users on 2/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 4/149:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 2/10$604
This Gotogate deal was found by Cheapflights users on 2/7. 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.
Thu 4/233:30 pm
PDX
-
LHR
1 stop20h 50m
Icelandair
Fri 5/11:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 2/7$605
This oojo deal was found by Cheapflights users on 2/9. 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.
Sat 4/253:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Fri 5/11:05 pm
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 2/9$606
This oojo deal was found by Cheapflights users on 2/8. 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 3/173:45 pm
PDX
-
LGW
1 stop12h 10m
Icelandair
Tue 3/313:40 pm
LGW
-
PDX
1 stop34h 20m
Icelandair
Deal found 2/8$606
This KAYAK deal was found by Cheapflights users on 2/10. 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 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 2/10$608

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$599
(oojo)

One-way from

$241
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$775

Good round-trip deal

$673 or less

Good one-way deal

$361 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. 20% potential increase in price ($201 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Average for round-trip flights in February 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 February 11, 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 - STN

PDXSTN

Portland

Sat 4/11

3:30 pm-11:15 pm

2 stops23h 45m

London Stansted

Sat 4/25

10:00 pm-9:10 am

3 stops43h 10m

$601

PortlandLondon

PDX - LTN

PDXLTN

Portland

Thu 4/23

3:30 pm-11:25 pm

2 stops23h 55m

London Luton

Fri 5/1

6:20 am-6:00 pm

2 stops19h 40m

$618

PortlandLondon

PDX - LTN

PDXLTN

Portland

Tue 3/10

3:45 pm-9:05 pm

2 stops22h 20m

London Luton

Tue 3/17

9:50 pm-6:00 pm

2 stops27h 10m

$631

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 4/25

3:30 pm-11:55 am

1 stop12h 25m

London Heathrow

Fri 5/1

1:05 pm-6:00 pm

1 stop12h 55m

$634

PortlandLondon

PDX - STN

PDXSTN

Portland

Thu 4/23

3:30 pm-10:25 pm

2 stops22h 55m

London Stansted

Fri 5/1

6:30 am-6:00 pm

2 stops19h 30m

$641

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 3/18

6:05 am-7:05 am

1 stop18h 00m

London Heathrow

Wed 4/1

11:45 am-11:10 am

1 stop31h 25m

$667

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 3/18

6:05 am-7:05 am

1 stop18h 00m

London Heathrow

Thu 4/2

8:40 am-11:10 am

1 stop34h 30m

$667

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/22

7:00 am-6:20 am

1 stop15h 20m

London Heathrow

Wed 4/29

6:30 am-11:10 am

1 stop12h 40m

$667

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/23

9:59 am-10:00 am

1 stop17h 01m

London Heathrow

Mon 4/6

9:55 am-11:10 am

1 stop33h 15m

$668

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 5/4

1:32 pm-3:35 pm

1 stop18h 03m

London Heathrow

Wed 5/13

11:45 am-11:55 pm

2 stops20h 10m

$677

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

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 February.
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 February 6, 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 $490). Flying from Portland to London in June is currently the most expensive (average of $808). 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.

How much does it cost to fly round-trip from Portland to London?

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 February 11, 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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Crew

8.5

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 4 outbound flights to London per day. 12 airlines have flights to London from Portland on a regular basis.

  • How long is the flight from Portland to London?

    Icelandair, Delta, and Virgin Atlantic can get you from Portland to London in just under 12h 25m. Your travel time can differ by up to 8h. 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 38% 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 $1,410. The most popular route, (Portland - London Heathrow), can usually be booked for $532.

  • 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 $54 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 $490). Flying from Portland to London in June is currently the most expensive (average of $808). 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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Croydon
Hounslow
Southend-on-Sea
Harrow
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Gatwick
Dartford
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Winchester
Orpington
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Horley
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Eastbourne
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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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$486Average$732FlexibilityNo cancel feeOn-time76%
DeltaCheapest$551Average$846FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$558Average$728FlexibilityNo cancel feeOn-time72%
KLMCheapest$561Average$646FlexibilityNo cancel feeOn-time75%
IberiaCheapest$574Average$818FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$578Average$820FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$600Average$1,085FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$607Average$973FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$628Average$893FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$630Average$939FlexibilityNo cancel feeOn-time67%

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