฿12,815 Cheap Flights from Portland (PDX) to London (LHR)

View ฿12,815 flight on Sat, 20 Sep 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at ฿12,815 for one-way flights and ฿17,185 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, 24 Oct - Fri, 7 Nov
PDX
Portland
LHR
London
฿17,185 Return, found 2 days ago
฿17,185
Return
found 2 days ago
Select Icelandair flight, departing Fri, 24 Oct from Portland to London, returning Fri, 7 Nov, priced at ฿17,185 found 2 days ago
Icelandair
Tue, 25 Nov - Tue, 2 Dec
PDX
Portland
LHR
London
฿17,240 Return, found 4 days ago
฿17,240
Return
found 4 days ago
Select Icelandair flight, departing Tue, 25 Nov from Portland to London, returning Tue, 2 Dec, priced at ฿17,240 found 4 days ago
Delta
Tue, 25 Nov - Tue, 2 Dec
PDX
Portland
LHR
London
฿18,590 Return, found 4 days ago
฿18,590
Return
found 4 days ago
Select Delta flight, departing Tue, 25 Nov from Portland to London, returning Tue, 2 Dec, priced at ฿18,590 found 4 days ago
Delta
Fri, 24 Oct - Fri, 7 Nov
PDX
Portland
LHR
London
฿19,380 Return, found 2 days ago
฿19,380
Return
found 2 days ago
Select Delta flight, departing Fri, 24 Oct from Portland to London, returning Fri, 7 Nov, priced at ฿19,380 found 2 days ago
Delta
Tue, 25 Nov - Tue, 2 Dec
PDX
Portland
LHR
London
฿19,450 Return, found 4 days ago
฿19,450
Return
found 4 days ago
Select Delta flight, departing Tue, 25 Nov from Portland to London, returning Tue, 2 Dec, priced at ฿19,450 found 4 days ago
Delta
Fri, 24 Oct - Fri, 7 Nov
PDX
Portland
LHR
London
฿19,770 Return, found 2 days ago
฿19,770
Return
found 2 days ago
Select Delta flight, departing Fri, 24 Oct from Portland to London, returning Fri, 7 Nov, priced at ฿19,770 found 2 days ago
Delta
Fri, 24 Oct - Fri, 7 Nov
PDX
Portland
LHR
London
฿20,240 Return, found 2 days ago
฿20,240
Return
found 2 days ago
Select Delta flight, departing Fri, 24 Oct from Portland to London, returning Fri, 7 Nov, priced at ฿20,240 found 2 days ago
KLM
Fri, 24 Oct - Fri, 7 Nov
PDX
Portland
LHR
London
฿21,100 Return, found 2 days ago
฿21,100
Return
found 2 days ago
Select KLM flight, departing Fri, 24 Oct from Portland to London, returning Fri, 7 Nov, priced at ฿21,100 found 2 days ago
Air France
Sat, 20 Sep - Sat, 20 Dec
PDX
Portland
LHR
London
฿21,215 Return, found 1 day ago
฿21,215
Return
found 1 day ago
Select Air France flight, departing Sat, 20 Sep from Portland to London, returning Sat, 20 Dec, priced at ฿21,215 found 1 day ago
United
Sat, 20 Sep - Sat, 20 Dec
PDX
Portland
LHR
London
฿22,485 Return, found 1 day ago
฿22,485
Return
found 1 day ago
Select United flight, departing Sat, 20 Sep from Portland to London, returning Sat, 20 Dec, priced at ฿22,485 found 1 day ago

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

October is typically the cheapest month to fly

From ฿16,122 - ฿38,259 per traveller.

Graph displaying average flight prices per month

Flight from Portland to London route information
Origin airport
Portland Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, United, WestJet
Return price
฿17,185
Distance
7839 km

Perfect flights from Portland to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Portland to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Portland Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from ฿12,815 and roundtrip prices from ฿17,185. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Heathrow and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in London.

Frequently asked questions

How much is a flight from Portland Intl. Airport (PDX) to Heathrow Airport (LHR)?
If you're travelling between PDX Airport and London Heathrow, round-trip flights start from ฿17,185. This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't wait around. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Portland Airport to Heathrow Airport (LHR)?
Most flights can be conveniently cancelled online, but whether or not you incur a fee differs between airlines. If you do have to cancel your holiday, follow the instructions in the Customer Service Portal.
How do I find cheap flights from PDX Airport to Heathrow Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for PDX to LHR flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Portland Intl. Airport (PDX) to London Heathrow?
You'll have 7,900 kilometres to cover on the long-haul Portland to Hounslow route. Dress in comfy clothes and consider taking a pair of noise-cancelling headphones.
Which airlines fly direct from Portland Intl. Airport (PDX) to Heathrow Airport?
If you're eager to fly straight from Portland Airport to Heathrow Airport, British Airways (BA) is a top option. It operates 17 flights every month between Portland and Hounslow.
Are PDX to LHR flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes nab a bargain, with some super cheap fares from Portland Airport to LHR showing up a few weeks prior to the departure date. If you'd rather plan ahead of time, Expedia compares and updates all the best flight deals continually — as early as a year in advance in some cases. It depends on the carrier though, as not every airline advertises prices that far in advance.

Explore a world of travel with Expedia

London Airports

London

*Available to Expedia members.