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$306+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$710
(Gurufare)

One-way from

$306
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$1,235

Good round-trip deal

$702 or less

Good one-way deal

$489 or less
From Portland to London (LON)
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One-way flight from Portland to London (LON)
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Highest demand for flights based on searches. 22% potential increase in price ($239 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Portland to London (LON).
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Price to beat on a one-way flight from Portland to London (LON).
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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 June 12, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 6/10. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:00 pmPDX - LHR
2 stops21h 30mScandinavian Airlines
Mon 10/66:40 amLHR - PDX
2 stops23h 40mScandinavian Airlines
Deal found 6/10$707
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Thu 10/27:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Tue 10/143:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 6/10$709
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/113:20 pmPDX - LGW
1 stop12h 25mIcelandair
Thu 8/213:40 pmLGW - PDX
1 stop34h 15mIcelandair
Deal found 6/10$710
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1111:59 pmPDX - LHR
2 stops22h 31mAir Canada
Mon 8/253:50 pmLHR - PDX
2 stops31h 00mAir Canada
Deal found 6/11$713
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:21 amPDX - LGW
1 stop19h 34mMultiple Airlines
Wed 9/1710:55 amLGW - PDX
1 stop17h 35mMultiple Airlines
Deal found 6/11$713
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2310:50 pmPDX - LHR
2 stops23h 40mUnited Airlines
Sat 9/63:50 pmLHR - PDX
2 stops27h 59mUnited Airlines
Deal found 6/10$714
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/297:00 amPDX - LGW
1 stop19h 00mDelta
Thu 8/712:00 pmLGW - PDX
1 stop17h 30mDelta
Deal found 6/12$715
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:00 amPDX - LHR
2 stops17h 50mLufthansa
Fri 9/192:10 pmLHR - PDX
1 stop12h 36mLufthansa
Deal found 6/11$716
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:15 amPDX - STN
3 stops22h 30mMultiple Airlines
Sat 8/910:00 pmSTN - PDX
2 stops33h 01mMultiple Airlines
Deal found 6/12$716
This SWISS deal was found by Cheapflights users on 6/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:30 amPDX - LCY
2 stops25h 00mSWISS
Tue 10/77:20 pmLCY - PDX
2 stops31h 26mSWISS
Deal found 6/11$717
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:53 pmPDX - LGW
2 stops20h 57mSWISS
Wed 10/86:35 pmLGW - PDX
2 stops32h 11mSWISS
Deal found 6/10$717
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
Tue 9/2310:55 amPDX - LCY
2 stops21h 30mLufthansa
Tue 10/147:10 pmLCY - PDX
2 stops31h 23mLufthansa
Deal found 6/11$722

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 June 12, 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

Thu 10/2

1:00 pm-6:30 pm

2 stops21h 30m

London Heathrow

Mon 10/6

6:40 am-10:20 pm

2 stops23h 40m

$707

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 10/2

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 10/14

3:40 pm-5:35 pm

Nonstop9h 55m

$709

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 8/11

3:20 pm-11:45 am

1 stop12h 25m

London Gatwick

Thu 8/21

3:40 pm-5:55 pm

1 stop34h 15m

$710

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 8/11

11:59 pm-6:30 am

2 stops22h 31m

London Heathrow

Mon 8/25

3:50 pm-2:50 pm

2 stops31h 00m

$713

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sun 9/14

7:21 am-10:55 am

1 stop19h 34m

London Gatwick

Wed 9/17

10:55 am-8:30 pm

1 stop17h 35m

$713

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/23

10:50 pm-6:30 am

2 stops23h 40m

London Heathrow

Sat 9/6

3:50 pm-11:49 am

2 stops27h 59m

$714

PortlandLondon

PDX - LGW

PDXLGW

Portland

Tue 7/29

7:00 am-10:00 am

1 stop19h 00m

London Gatwick

Wed 8/13

12:00 pm-9:31 pm

1 stop17h 31m

$715

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 9/11

10:00 am-11:50 am

2 stops17h 50m

London Heathrow

Fri 9/19

2:10 pm-6:46 pm

1 stop12h 36m

$716

PortlandLondon

PDX - STN

PDXSTN

Portland

Wed 8/6

6:15 am-12:45 pm

3 stops22h 30m

London Stansted

Sat 8/9

10:00 pm-11:01 pm

2 stops33h 01m

$716

PortlandLondon

PDX - LCY

PDXLCY

Portland

Tue 9/23

8:30 am-5:30 pm

2 stops25h 00m

London City

Tue 10/7

7:20 pm-6:46 pm

2 stops31h 26m

$717

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 57 results
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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 9, 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 $1,108). 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 June 12, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% 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 June 12, 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).

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 June 12, 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.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

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. 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 $710. Other airlines that can offer you cheap pricing are Air Canada, from $713, and United Airlines, from $714. You may be able to fly from Portland to London for 14% 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 ($306), JetBlue ($365), and Air Canada ($382).

  • 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 (83%), Alaska Airlines (83%) and Aer Lingus (83%).

  • What are the cheapest flights from Portland to London?

    The cheapest flight price from Portland to London is $408. On average you can expect to pay $1,974. The most popular route, (Portland - London Heathrow), can usually be booked for $518.

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

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

  • 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 $55 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 Reykjavik.

  • 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 $1,108). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Sutton
Aylesbury
Chelmsford
Brentwood
Chichester
Wembley
Arundel

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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
Boise to Heathrow flights
Portland to Edinburgh flights
Portland to Stansted flights
Portland to Luton flights
Boise to Gatwick flights
Redmond to Heathrow flights
Medford to Heathrow flights
Boise to Edinburgh flights
Boise to London City flights
Eugene to Heathrow flights
Portland to Manchester flights
Portland to Bristol flights
Redmond to Gatwick flights
Medford to Manchester flights
Medford to Gatwick flights
Eugene to Gatwick flights
Redmond to London City flights
Portland to Leeds flights
Eugene to London City flights
Boise to Birmingham flights
Portland to Southend flights
Redmond to Southampton 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$491Average$782FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$580Average$803FlexibilityNo cancel feeOn-time67%
IberiaCheapest$586Average$778FlexibilityNo cancel feeOn-time77%
DeltaCheapest$602Average$867FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$613Average$875FlexibilityNo cancel feeOn-time70%
KLMCheapest$617Average$896FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$617Average$882FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$622Average$787FlexibilityNo cancel feeOn-time72%
FinnairCheapest$629Average$798FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$645Average$878FlexibilityNo cancel feeOn-time69%

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