$229 Cheap Flights from Portland (PDX) to London (LHR)

View $229 flight on Sat, Oct 11, 2025Opens in a new window

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

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Cheap Flights from Portland to London (PDX-LHR)

Prices were available within the past 7 days and start at $229 for one-way flights and $480 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$480 Roundtrip, found 6 hours ago
$480
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $480 found 6 hours ago
Virgin Atlantic
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$490 Roundtrip, found 6 hours ago
$490
Roundtrip
found 6 hours ago
Select Virgin Atlantic flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $490 found 6 hours ago
United
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$490 Roundtrip, found 6 hours ago
$490
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $490 found 6 hours ago
Iberia
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$495 Roundtrip, found 6 hours ago
$495
Roundtrip
found 6 hours ago
Select Iberia flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $495 found 6 hours ago
Delta
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$496 Roundtrip, found 6 hours ago
$496
Roundtrip
found 6 hours ago
Select Delta flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $496 found 6 hours ago
Icelandair
Wed, Aug 27 - Mon, Sep 1
PDX
Portland
LHR
London
$519 Roundtrip, found 4 days ago
$519
Roundtrip
found 4 days ago
Select Icelandair flight, departing Wed, Aug 27 from Portland to London, returning Mon, Sep 1, priced at $519 found 4 days ago
British Airways
Sat, Aug 2 - Sat, Aug 23
PDX
Portland
LHR
London
$530 Roundtrip, found 6 hours ago
$530
Roundtrip
found 6 hours ago
Select British Airways flight, departing Sat, Aug 2 from Portland to London, returning Sat, Aug 23, priced at $530 found 6 hours ago
Lufthansa
Sun, Dec 7 - Wed, Dec 17
PDX
Portland
LHR
London
$544 Roundtrip, found 5 hours ago
$544
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Sun, Dec 7 from Portland to London, returning Wed, Dec 17, priced at $544 found 5 hours ago
British Airways
Tue, Aug 5 - Thu, Aug 28
PDX
Portland
LHR
London
$549 Roundtrip, found 3 hours ago
$549
Roundtrip
found 3 hours ago
Select British Airways flight, departing Tue, Aug 5 from Portland to London, returning Thu, Aug 28, priced at $549 found 3 hours ago
Air Canada
Wed, Sep 10 - Fri, Sep 19
PDX
Portland
LHR
London
$549 Roundtrip, just found
$549
Roundtrip
just found
Select Air Canada flight, departing Wed, Sep 10 from Portland to London, returning Fri, Sep 19, priced at $549 just found

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

October is typically the cheapest month to fly

From $498 - $1,091 per traveler.

Graph displaying average flight prices per month

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 $1,506
LGW
Gatwick
Average driving time to city center52 min
Flights from $1,506
Select flight to London City LCY. Closest option available. Average driving time to city center is 21 minutes. Flights from $2,526
LCY
London City
Closest
Average driving time to city center21 min
Flights from $2,526
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
$479
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 August. 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 $229 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?
Book cheap return fares starting at $669 from Portland Intl. Airport (PDX) to Heathrow Airport (LHR). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a American Airlines flight leaving PDX on July 20 2025 and touching down at LHR. The price was last updated on July 2 2025 and has not changed since.
What is the cheapest month to fly from PDX to LHR?
The cheapest flights from PDX to LHR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PDX to LHR?
Right now, the cheapest carrier operating one-way flights from PDX to LHR is Iberia. You can take off on this route from $428. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PDX on July 27 2025. Prices were last updated on July 2 2025 and have not changed since.
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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