London

$265+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Jul 8 — Jul 151
We work with more than 300 partners to bring you better travel deals

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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to London are usually found in October or November, booked 69 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 July 3, 2025.

Round-trip from

$651
(oojo)

One-way from

$265
(Icelandair)

Popular in

June

Cheapest in

October

Average price

$1,095

Good round-trip deal

$706 or less

Good one-way deal

$466 or less
From Portland to London (LON)
One-way flight from Portland to London (LON)
Highest demand for flights based on searches. 22% potential increase in price ($240 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Average for round-trip flights in July 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 July 3, 2025.

This oojo deal was found by Cheapflights users on 7/1. 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 9/253:20 pmPDX - LGW
1 stop15h 20mIcelandair
Sat 10/113:40 pmLGW - PDX
1 stop34h 15mIcelandair
Deal found 7/1$651
This Cheapflightsfares deal was found by Cheapflights users on 7/1. 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.
Sun 10/127:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Tue 10/2811:55 amLHR - PDX
1 stop16h 52mBritish Airways
Deal found 7/1$652
This Booking.com deal was found by Cheapflights users on 7/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/43:15 pmPDX - LHR
1 stop12h 35mMultiple Airlines
Tue 11/186:35 amLHR - PDX
2 stops19h 55mMultiple Airlines
Deal found 7/2$653
This Iberia deal was found by Cheapflights users on 7/2. 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 8/137:25 pmPDX - LHR
Nonstop9h 35mIberia
Thu 8/2112:00 pmLHR - PDX
1 stop17h 17mIberia
Deal found 7/2$654
This Delta deal was found by Cheapflights users on 7/3. 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.
Fri 8/86:00 amPDX - LHR
1 stop17h 15mDelta
Sat 8/306:15 amLHR - PDX
2 stops17h 55mDelta
Deal found 7/3$655
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:05 amPDX - LGW
3 stops26h 50mMultiple Airlines
Wed 8/2710:00 pmLGW - PDX
3 stops33h 01mMultiple Airlines
Deal found 6/30$655
This Icelandair deal was found by Cheapflights users on 7/1. 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.
Mon 7/213:20 pmPDX - LHR
1 stop21h 00mIcelandair
Tue 8/269:25 pmLHR - PDX
1 stop28h 30mIcelandair
Deal found 7/1$657
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:45 amPDX - LHR
1 stop18h 40mUnited Airlines
Wed 9/176:30 amLHR - PDX
2 stops16h 16mUnited Airlines
Deal found 6/30$661
This Air Canada deal was found by Cheapflights users on 7/2. 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.
Sun 8/176:15 amPDX - LHR
2 stops21h 35mAir Canada
Fri 8/292:05 pmLHR - PDX
2 stops29h 44mAir Canada
Deal found 7/2$662
This Mytrip deal was found by Cheapflights users on 7/2. 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 9/216:15 amPDX - STN
3 stops20h 20mMultiple Airlines
Sat 9/2710:00 pmSTN - PDX
2 stops24h 46mMultiple Airlines
Deal found 7/2$662
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Wed 10/110:00 amPDX - LHR
2 stops17h 50mLufthansa
Wed 10/82:10 pmLHR - PDX
1 stop12h 36mLufthansa
Deal found 7/2$668
This SWISS deal was found by Cheapflights users on 7/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:51 amPDX - LGW
2 stops22h 59mSWISS
Thu 10/26:40 pmLGW - PDX
2 stops32h 06mSWISS
Deal found 7/2$670

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 July 3, 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

Thu 9/25

3:20 pm-2:40 pm

1 stop15h 20m

London Gatwick

Sat 10/11

3:40 pm-5:55 pm

1 stop34h 15m

$651

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/12

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 10/28

11:55 am-9:47 pm

1 stop16h 52m

$652

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 11/4

3:15 pm-11:50 am

1 stop12h 35m

London Heathrow

Tue 11/18

6:35 am-6:30 pm

2 stops19h 55m

$653

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 8/13

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Fri 8/22

10:30 am-9:15 pm

1 stop18h 45m

$654

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 8/8

6:00 am-7:15 am

1 stop17h 15m

London Heathrow

Sat 8/30

6:15 am-4:10 pm

2 stops17h 55m

$655

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 8/18

10:05 am-8:55 pm

3 stops26h 50m

London Gatwick

Wed 8/27

10:00 pm-11:01 pm

3 stops33h 01m

$655

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/21

3:20 pm-8:20 pm

1 stop21h 00m

London Heathrow

Mon 8/25

9:25 pm-5:55 pm

1 stop28h 30m

$657

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/7

1:45 pm-2:10 pm

1 stop16h 25m

London Heathrow

Tue 9/16

6:30 am-2:46 pm

2 stops16h 16m

$661

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 8/17

6:15 am-11:50 am

2 stops21h 35m

London Heathrow

Fri 8/29

2:05 pm-11:49 am

2 stops29h 44m

$662

PortlandLondon

PDX - STN

PDXSTN

Portland

Sun 9/21

6:15 am-10:35 am

3 stops20h 20m

London Stansted

Sat 9/27

10:00 pm-2:46 pm

2 stops24h 46m

$662

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 39 results
1
2
3
4

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

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 June 27, 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 69 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 $1,098). 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 July 3, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 17% 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 Monday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland to London

Explore weekly flight availability from Portland to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 3, 2025.

The most flights from PDX to LON are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

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

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 July 3, 2025.
See what other customers who have flown with Delta, KLM, and SWISS 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.
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 7 outbound flights to London per day. 11 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 $651. Other airlines that can offer you cheap pricing are British Airways, from $652, and United Airlines, from $653. You may be able to fly from Portland to London for 21% 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 ($265), JetBlue ($347), and Air Canada ($413).

  • 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 (82%), Alaska Airlines (82%) and Aer Lingus (82%).

  • What are the cheapest flights from Portland to London?

    The cheapest flight price from Portland to London is $374. On average you can expect to pay $1,857. The most popular route, (Portland - London Heathrow), can usually be booked for $484.

  • 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 $61 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 $1,098). 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
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Aylesbury
Chelmsford
Brentwood
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Dartford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$491Average$772FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$580Average$795FlexibilityNo cancel feeOn-time67%
IberiaCheapest$585Average$781FlexibilityNo cancel feeOn-time77%
DeltaCheapest$602Average$866FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$616Average$866FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$617Average$872FlexibilityNo cancel feeOn-time71%
FinnairCheapest$620Average$798FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$621Average$783FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$645Average$862FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$709Average$965FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.