£269 Cheap Flights from Portland (PDX) to Lisbon (LIS)

View £269 flight on Mon, 26 Oct 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Humberto Delgado Airport (LIS)

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Cheap Flights from Portland (PDX) to Lisbon (LIS)

Prices were available within the past 7 days and start at £269 for one-way flights and £596 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Finnair
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£596 Return, found 4 days ago
£596
Return
found 4 days ago
Select Finnair flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £596 found 4 days ago
Finnair
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£604 Return, found 4 days ago
£604
Return
found 4 days ago
Select Finnair flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £604 found 4 days ago
Finnair
Tue, 20 Oct - Tue, 27 Oct
PDX
Portland
LIS
Lisbon
£620 Return, found 1 day ago
£620
Return
found 1 day ago
Select Finnair flight, departing Tue, 20 Oct from Portland to Lisbon, returning Tue, 27 Oct, priced at £620 found 1 day ago
Finnair
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£621 Return, found 4 days ago
£621
Return
found 4 days ago
Select Finnair flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £621 found 4 days ago
Iberia
Wed, 21 Oct - Wed, 28 Oct
PDX
Portland
LIS
Lisbon
£628 Return, found 1 day ago
£628
Return
found 1 day ago
Select Iberia flight, departing Wed, 21 Oct from Portland to Lisbon, returning Wed, 28 Oct, priced at £628 found 1 day ago
KLM
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£633 Return, found 4 days ago
£633
Return
found 4 days ago
Select KLM flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £633 found 4 days ago
Lufthansa
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£634 Return, found 4 days ago
£634
Return
found 4 days ago
Select Lufthansa flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £634 found 4 days ago
Finnair
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£635 Return, found 4 days ago
£635
Return
found 4 days ago
Select Finnair flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £635 found 4 days ago
Air France
Mon, 26 Oct - Thu, 19 Nov
PDX
Portland
LIS
Lisbon
£638 Return, found 4 days ago
£638
Return
found 4 days ago
Select Air France flight, departing Mon, 26 Oct from Portland to Lisbon, returning Thu, 19 Nov, priced at £638 found 4 days ago
British Airways
Wed, 19 Aug - Thu, 27 Aug
PDX
Portland
LIS
Lisbon
£658 Return, found 2 days ago
£658
Return
found 2 days ago
Select British Airways flight, departing Wed, 19 Aug from Portland to Lisbon, returning Thu, 27 Aug, priced at £658 found 2 days ago

Find the cheapest month to fly from Portland (PDX) to Lisbon (LIS)

November is typically the cheapest month to fly

From £398 - £768 per traveller.

Frequently asked questions

What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
February is typically the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado), with average return fares of approximately £434. This is about 38% lower than the average price throughout the year. February often sees lower prices as it's outside peak holiday seasons, leading to less demand. Other cheap months to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) include January and November.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado), 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 time to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
Based on booking data from the past year, the cheapest months to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) are typically February and January, with average return flight prices around £434. These months fall outside of peak travel seasons, which often means fewer crowds and a more relaxed experience in Lisbon. While these might not be the warmest months, they offer a great opportunity to explore Lisbon at a more affordable price point.
How many flights per day from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
There are approximately 63 connecting flights per day from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado). Some common connection points include O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA), and San Francisco Intl. (SFO).
What is the earliest flight from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
The earliest flight from Portland International Airport (PDX) to Lisbon (LIS) typically departs at approximately 12:30 AM local time, operated by Delta. This is a seasonal service active in December. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select 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 Lisbon (LIS-Humberto Delgado)?
You'll typically find the most flights from Portland International Airport (PDX) to Lisbon (LIS) on a Wednesday, with around 68 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and Alaska Airlines. Flight schedules are consistent throughout the week, so you'll have a good selection of flights no matter which day you choose.
What are the most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
The most popular departure times for flights from Portland Intl. (PDX) to Lisbon (LIS) are in the early morning, from 6am to 9am. About 31% of passengers prefer this time. Many major carriers, including United Airlines, Air Canada and Delta Air Lines, offer flights during this window. This timing works well because it allows you to start your journey early and arrive in Lisbon with plenty of time to settle in.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado)?
A flight from PDX to LIS with a layover takes around 17 hours, with the route covering approximately 5,300 miles. 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 Lisbon (LIS-Humberto Delgado)?
Select the "Business class" and "First class" filters when looking for PDX to LIS flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) 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.
What airports do you fly into for Lisbon from Portland Intl. (PDX)?
If you're planning to travel to Lisbon from Portland Intl. (PDX), you can fly directly into Humberto Delgado (LIS) Some flights may connect through major hubs like O'Hare Intl. (ORD), San Francisco Intl. (SFO), Dallas-Fort Worth Intl. (DFW) before reaching Lisbon. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) 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-Portland Intl.) to Lisbon (LIS-Humberto Delgado) flight and hotel package?
Securing a Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) 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 Lisbon (LIS-Humberto Delgado)?
If you booked your Portland, OR (PDX-Portland Intl.) to Lisbon (LIS-Humberto Delgado) 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
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, British Airways, Brussels Airlines, Finnair, Iberia, KLM, Lufthansa, Swiss International Air Lines, Virgin Atlantic
Return price
£595
Distance
8478 km

Book with confidence

Compare flights from Portland to Lisbon easily and book with confidence

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

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 Humberto Delgado (LIS)

The easiest way to view the best deals on flights from Portland to Lisbon 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 Humberto Delgado start at just £596 and range up to £658.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Portland and Lisbon
  • 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 Lisbon flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Portland Intl. to Humberto Delgado 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 Lisbon easily and book with confidence

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