$349 Cheap Flights from Portland (PDX) to London (LHR)

View $349 flight on Thu, Apr 30, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Heathrow Airport (LHR)

Cheap Flights from Portland to London (PDX-LHR)

Prices were available within the past 7 days and start at $349 for one-way flights and $402 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, Nov 6 - Tue, Nov 11
PDX
Portland
LHR
London
$402 Roundtrip, found 1 hour ago
$402
Roundtrip
found 1 hour ago
Select Icelandair flight, departing Thu, Nov 6 from Portland to London, returning Tue, Nov 11, priced at $402 found 1 hour ago
Air Canada
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$474 Roundtrip, found 1 hour ago
$474
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $474 found 1 hour ago
British Airways
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$479 Roundtrip, found 1 hour ago
$479
Roundtrip
found 1 hour ago
Select British Airways flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $479 found 1 hour ago
American Airlines
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$479 Roundtrip, found 1 hour ago
$479
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $479 found 1 hour ago
United
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$485 Roundtrip, found 1 hour ago
$485
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $485 found 1 hour ago
Iberia
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$489 Roundtrip, found 1 hour ago
$489
Roundtrip
found 1 hour ago
Select Iberia flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $489 found 1 hour ago
Lufthansa
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$493 Roundtrip, found 1 hour ago
$493
Roundtrip
found 1 hour ago
Select Lufthansa flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $493 found 1 hour ago
American Airlines
Fri, Apr 3 - Fri, Apr 10
PDX
Portland
LHR
London
$530 Roundtrip, found 1 hour ago
$530
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Apr 3 from Portland to London, returning Fri, Apr 10, priced at $530 found 1 hour ago
Virgin Atlantic
Sun, Sep 28 - Wed, Oct 15
PDX
Portland
LHR
London
$544 Roundtrip, found 1 hour ago
$544
Roundtrip
found 1 hour ago
Select Virgin Atlantic flight, departing Sun, Sep 28 from Portland to London, returning Wed, Oct 15, priced at $544 found 1 hour ago
Delta
Wed, Oct 8 - Wed, Oct 15
PDX
Portland
LHR
London
$544 Roundtrip, found 1 hour ago
$544
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Oct 8 from Portland to London, returning Wed, Oct 15, priced at $544 found 1 hour ago

Find the cheapest month to fly from Portland (PDX) to London (LHR)

April is typically the cheapest month to fly

From $498 - $1,360 per traveler.

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gatwick LGW. Average driving time to city center is 52 minutes. Flights from $946
LGW
Gatwick
Average driving time to city center52 min
Flights from $946
Select flight to London City LCY. Closest option available. Average driving time to city center is 21 minutes. Flights from $687
LCY
London City
Closest
Average driving time to city center21 min
Flights from $687
Flights from Portland (PDX) to London (LHR)
Origin airport
Portland Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, Virgin Atlantic, WestJet
Roundtrip price
$402
Distance
4899 mi
Average flight time
9 hours 35 mins

Portland to London Flights

The cheapest times to fly from Portland to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to London are during the month of November. You can find some of the cheapest flights from Portland to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to London

Sunday is one of the best days to book for cheap flights from Portland to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $349 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Heathrow Airport (LHR) cost?
Get a cheap one-way flight from $349 or cheap return flight from $402 from Portland Intl. Airport (PDX) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
Traveling in November may help you find better deals, as it's the cheapest month for flights between PDX and LHR. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
To find the cheapest airline flying from PDX to LHR, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
You'll have to catch a flight with a layover when traveling from Portland Intl. Airport (PDX) to Heathrow Airport (LHR). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from PDX to LHR?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from PDX to LHR?
With 100% of flights generally landing on schedule, Delta Air Lines has the best on-time performance for direct flights from Portland Intl. Airport (PDX) to Heathrow Airport (LHR). To keep track of your flight status and receive notifications if anything changes, simply head to the Expedia App.
What is the best time to fly from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
To arrive at Heathrow Airport (LHR) on time, opt for a flight that leaves from Portland Intl. Airport (PDX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Heathrow Airport (LHR) last-minute?
Booking your plane ticket from PDX to LHR shortly before your getaway is generally more expensive. However, if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a PDX to LHR flight and hotel package?
You'll generally save money by booking a PDX to LHR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your ideal accommodations and flights, consider adding extras including tours, car rentals and activities.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
Typically, you can cancel or reschedule your PDX to LHR flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you want more details, head to our Customer Service portal.

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*Available to One Key members.