London

$350+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Mar 31 — Apr 71
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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
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3. Compare prices and book
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Cheapflights Tip: The best prices from Portland to London are usually found in November or January, booked 68 days in advance, depart on a Tuesday or Wednesday and return on a Friday

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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$604
(oojo)

One-way from

$350
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$746

Good round-trip deal

$742 or less

Good one-way deal

$546 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. 23% potential increase in price ($257 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Average for round-trip flights in March 2025
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).

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 March 26, 2025.

This FlightHub deal was found by Cheapflights users on 3/25. 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.
Sat 10/43:20 pmPDX - LHR
1 stop12h 35mIcelandair
Thu 10/169:25 pmLHR - PDX
1 stop28h 30mIcelandair
Deal found 3/25$604
This oojo deal was found by Cheapflights users on 3/25. 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.
Wed 5/73:20 pmPDX - LGW
1 stop15h 20mIcelandair
Sun 5/111:00 pmLGW - PDX
1 stop12h 55mIcelandair
Deal found 3/25$604
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Sun 4/276:20 pmPDX - LGW
2 stops28h 00mMultiple Airlines
Sun 5/118:55 amLGW - PDX
2 stops35h 57mMultiple Airlines
Deal found 3/25$609
This Iberia deal was found by Cheapflights users on 3/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:01 amPDX - LHR
1 stop14h 24mIberia
Fri 10/312:20 pmLHR - PDX
Nonstop10h 15mIberia
Deal found 3/24$612
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/235:31 amPDX - LGW
2 stops21h 09mAmerican Airlines
Wed 4/3010:40 amLGW - PDX
2 stops21h 22mAmerican Airlines
Deal found 3/25$618
This Air Canada deal was found by Cheapflights users on 3/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:15 amPDX - LHR
2 stops16h 15mAir Canada
Wed 10/158:40 amLHR - PDX
2 stops18h 06mAir Canada
Deal found 3/24$621
This Air Canada deal was found by Cheapflights users on 3/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/223:25 pmPDX - LHR
1 stop13h 55mMultiple Airlines
Fri 10/316:30 amLHR - PDX
2 stops18h 54mMultiple Airlines
Deal found 3/24$628
This Delta deal was found by Cheapflights users on 3/25. 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 4/87:05 amPDX - LHR
1 stop20h 20mDelta
Wed 4/236:30 amLHR - PDX
1 stop12h 50mDelta
Deal found 3/25$637
This oojo deal was found by Cheapflights users on 3/25. 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.
Sun 4/277:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Tue 5/62:00 pmLHR - PDX
2 stops39h 21mBritish Airways
Deal found 3/25$638
This EaseMyTrip deal was found by Cheapflights users on 3/25. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/201:55 pmPDX - LHR
1 stop16h 20mVirgin Atlantic
Wed 4/3011:00 amLHR - PDX
1 stop13h 21mVirgin Atlantic
Deal found 3/25$643
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/302:58 pmPDX - LHR
1 stop13h 17mAmerican Airlines
Wed 5/73:40 pmLHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 3/25$644
This KLM deal was found by Cheapflights users on 3/25. 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.
Tue 4/159:55 amPDX - LHR
1 stop15h 55mKLM
Tue 4/2210:55 amLHR - PDX
1 stop15h 11mKLM
Deal found 3/25$653

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 March 26, 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 - LGW

PDXLGW

Portland

Wed 5/7

3:20 pm-2:40 pm

1 stop15h 20m

London Gatwick

Sun 5/11

1:00 pm-5:55 pm

1 stop12h 55m

$604

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 5/9

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

Tue 5/20

1:05 pm-5:55 pm

1 stop12h 50m

$605

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sun 4/27

6:20 pm-6:20 am

2 stops28h 00m

London Gatwick

Sun 5/11

8:55 am-12:52 pm

2 stops35h 57m

$609

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/8

7:35 am-6:25 am

1 stop14h 50m

London Heathrow

Wed 4/23

3:40 pm-5:35 pm

Nonstop9h 55m

$612

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 4/23

5:31 am-10:40 am

2 stops21h 09m

London Gatwick

Wed 4/30

10:40 am-12:02 am

2 stops21h 22m

$618

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 9/22

7:40 pm-11:50 am

2 stops32h 10m

London Heathrow

Fri 10/3

6:00 am-6:46 pm

2 stops20h 46m

$636

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/8

7:05 am-11:25 am

1 stop20h 20m

London Heathrow

Wed 4/23

6:30 am-11:20 am

1 stop12h 50m

$637

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/27

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 5/6

2:00 pm-9:21 pm

2 stops39h 21m

$638

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/22

10:10 am-1:20 pm

1 stop19h 10m

London Heathrow

Tue 4/29

2:10 pm-10:10 pm

1 stop16h 00m

$639

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/20

1:55 pm-2:15 pm

1 stop16h 20m

London Heathrow

Wed 4/30

11:00 am-4:21 pm

1 stop13h 21m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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.

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 peak 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

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 March 21, 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 68 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, November is the cheapest month in which you can book a flight from Portland to London (average of $661). Flying from Portland to London in June is currently the most expensive (average of $1,115). 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 March 26, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 21% on flights from Portland to London by exploring options for tickets at noon.

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 Thursday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 March 26, 2025.
Read through reviews of airlines operating flights from Portland to London, such as Delta, Alaska Airlines and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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

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

    Cheapflights users have booked flights from Portland to London round-trip from $604. Other airlines that can offer you cheap pricing are Iberia, from $612, and American Airlines, from $618. You may be able to fly from Portland to London for 29% 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 ($397), Iberia ($448), and United Airlines ($454).

  • 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 (74%), Alaska Airlines (74%) and Aer Lingus (74%).

  • What are the cheapest flights from Portland to London?

    The cheapest flight price from Portland to London is $449. On average you can expect to pay $2,128. The most popular route, (Portland - London Heathrow), can usually be booked for $597.

  • 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 Seattle?

    Pike Place Market, Space Needle, and Seattle Waterfront are the most popular attractions in Seattle if you're in need of something to do during your layover. Travelers on a layover in Seattle can visit Pike Place Market, Space Needle, and Seattle Waterfront, by traveling 11.2 mi, 12.0 mi, and 10.9 mi, respectively after landing at Seattle/Tacoma Intl. Travelers can book a car rental at Seattle/Tacoma Intl for about $47 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, November is the cheapest month in which you can book a flight from Portland to London (average of $661). Flying from Portland to London in June is currently the most expensive (average of $1,115). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Gatwick
Dover
Orpington
Watford
Milton Keynes
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Sutton

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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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$492Average$826FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$580Average$946FlexibilityNo cancel feeOn-time67%
IberiaCheapest$585Average$770FlexibilityNo cancel feeOn-time77%
DeltaCheapest$613Average$908FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$617Average$981FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$625Average$931FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$625Average$942FlexibilityNo cancel feeOn-time71%
FinnairCheapest$629Average$793FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$631Average$870FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$660Average$870FlexibilityNo cancel feeOn-time69%
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