A dinosaur skeleton in an airport terminal.

£239 Cheap Flights from Portland (PDX) to London (LHR)

View £239 flight on Sun, 4 Apr 2027Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • 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 £239 for one-way flights and £551 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Tue, 27 Oct - Wed, 4 Nov
PDX
Portland
LHR
London
£551 Return, found 8 hours ago
£551
Return
found 8 hours ago
Select KLM flight, departing Tue, 27 Oct from Portland to London, returning Wed, 4 Nov, priced at £551 found 8 hours ago
Virgin Atlantic
Tue, 13 Oct - Tue, 20 Oct
PDX
Portland
LHR
London
£551 Return, found 11 hours ago
£551
Return
found 11 hours ago
Select Virgin Atlantic flight, departing Tue, 13 Oct from Portland to London, returning Tue, 20 Oct, priced at £551 found 11 hours ago
KLM
Wed, 11 Nov - Tue, 17 Nov
PDX
Portland
LHR
London
£551 Return, found 5 hours ago
£551
Return
found 5 hours ago
Select KLM flight, departing Wed, 11 Nov from Portland to London, returning Tue, 17 Nov, priced at £551 found 5 hours ago
Air France
Tue, 13 Oct - Tue, 20 Oct
PDX
Portland
LHR
London
£555 Return, found 11 hours ago
£555
Return
found 11 hours ago
Select Air France flight, departing Tue, 13 Oct from Portland to London, returning Tue, 20 Oct, priced at £555 found 11 hours ago
Air Canada
Tue, 13 Oct - Tue, 20 Oct
PDX
Portland
LHR
London
£556 Return, found 11 hours ago
£556
Return
found 11 hours ago
Select Air Canada flight, departing Tue, 13 Oct from Portland to London, returning Tue, 20 Oct, priced at £556 found 11 hours ago
Finnair
Tue, 27 Oct - Wed, 4 Nov
PDX
Portland
LHR
London
£556 Return, found 8 hours ago
£556
Return
found 8 hours ago
Select Finnair flight, departing Tue, 27 Oct from Portland to London, returning Wed, 4 Nov, priced at £556 found 8 hours ago
American Airlines
Mon, 5 Oct - Tue, 13 Oct
PDX
Portland
LHR
London
£556 Return, found 3 days ago
£556
Return
found 3 days ago
Select American Airlines flight, departing Mon, 5 Oct from Portland to London, returning Tue, 13 Oct, priced at £556 found 3 days ago
Iberia
Tue, 27 Oct - Wed, 4 Nov
PDX
Portland
LHR
London
£556 Return, found 8 hours ago
£556
Return
found 8 hours ago
Select Iberia flight, departing Tue, 27 Oct from Portland to London, returning Wed, 4 Nov, priced at £556 found 8 hours ago
Air Canada
Mon, 5 Oct - Tue, 13 Oct
PDX
Portland
LHR
London
£558 Return, found 3 days ago
£558
Return
found 3 days ago
Select Air Canada flight, departing Mon, 5 Oct from Portland to London, returning Tue, 13 Oct, priced at £558 found 3 days ago
Icelandair
Mon, 25 Jan - Tue, 2 Feb
PDX
Portland
LHR
London
£559 Return, found 4 days ago
£559
Return
found 4 days ago
Select Icelandair flight, departing Mon, 25 Jan from Portland to London, returning Tue, 2 Feb, priced at £559 found 4 days ago

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

March is typically the cheapest month to fly

From £621 - £721 per traveller.

Frequently asked questions

How much does a flight from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow) cost?
You can find cheap one-way flights from £239 and cheap return flights from £551 PDX to LHR with Expedia. Return flights often range between £637 and £4834. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when PDX to LHR ticket fares go up or down.
What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
The cheapest months to fly from PDX to LHR are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Portland, OR (PDX) to London (LHR)?
Enter PDX to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
British Airways is one of the cheapest airlines offering nonstop return flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow), with prices starting from around £448 for flights that can be booked for departure within the next year. WestJet offers one of the cheapest connecting return flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow) starting from around £965. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
The best airline to fly with from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow) will differ from traveler to traveler. If you like to fly early, British Airways offers early morning flights. If price is the most important factor, British Airways typically offers the lowest fares. Alaska Airlines offers the most daily flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
There is 1 nonstop flight per day from Portland International (PDX) to London Heathrow (LHR). For even more choices, look at flights that include layovers, as there are around 73 connecting flights per day. Some common connection points include Seattle - Tacoma International (SEA), O'Hare International (ORD), and Los Angeles International (LAX).
What is the earliest flight from Portland, OR (PDX) to London (LHR)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Portland, OR (PDX) to London (LHR). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
You'll generally find the most flights from Portland International Airport (PDX) to London Heathrow (LHR) on a Thursday, with around 93 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Delta, Alaska Airlines, and United. Flight options are notably more plentiful on Thursdays compared to other days of the week, offering you greater flexibility.
What are the most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
The most popular departure time for flights from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow) is between 12pm and 3pm. Many major carriers, including American Airlines, Delta and United, offer flights during this window. Many travellers prefer this time as it allows for a morning in Portland and an evening arrival in London, giving you time to settle in.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
Direct flights from PDX to LHR usually take about 9 hours 30 minutes, traveling roughly 7,886 kilometers. If you opt for a connecting flight, expect to add around 6 hours 20 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
You can fly business class or first class between PDX and LHR. Airlines that offer business class service on this route include:
  • KLM
  • British Airways
  • Icelandair
  • Skywest Air
  • Alaska Airlines
  • Delta
  • United
  • American Airlines
  • Condor
  • Horizon Air
First class cabins are available on British Airways, Alaska Airlines, and American Airlines.
How do I earn miles on a Portland, OR (PDX) to London (LHR) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX) to London (LHR) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Portland, OR (PDX) to London (LHR) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX) to London (LHR) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Portland, OR (PDX) to London (LHR) flight and hotel package?
Securing a Portland, OR (PDX) to London (LHR) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow)?
If you booked your Portland, OR (PDX-Portland Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

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, United, Virgin Atlantic, WestJet
Return price
£550
Distance
7839 km
Average flight time
9 hours 30 mins

Book with confidence

Compare flights from Portland to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Portland to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Portland Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Portland Intl. (PDX) to Heathrow (LHR)

The easiest way to view the best deals on flights from Portland to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Portland Intl. to Heathrow start at just £551 and range up to £559.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Portland and London
  • booking your flight during October, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Portland to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Portland Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Portland to London easily and book with confidence

Explore a world of travel with Expedia

*Available to Expedia members.