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£177 Cheap Flights from Seattle (SEA) to Lisbon (LIS)

View £177 flight on Mon, 23 Nov 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Humberto Delgado Airport (LIS)

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Cheap Flights from Seattle (SEA) to Lisbon (LIS)

Prices were available within the past 7 days and start at £177 for one-way flights and £556 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, 27 Jan - Wed, 3 Feb
SEA
Seattle
LIS
Lisbon
£556 Return, found 1 day ago
£556
Return
found 1 day ago
Select Air Canada flight, departing Wed, 27 Jan from Seattle to Lisbon, returning Wed, 3 Feb, priced at £556 found 1 day ago
Air Canada
Wed, 3 Feb - Wed, 10 Feb
SEA
Seattle
LIS
Lisbon
£558 Return, found 4 days ago
£558
Return
found 4 days ago
Select Air Canada flight, departing Wed, 3 Feb from Seattle to Lisbon, returning Wed, 10 Feb, priced at £558 found 4 days ago
KLM
Wed, 2 Dec - Wed, 9 Dec
SEA
Seattle
LIS
Lisbon
£559 Return, found 1 hour ago
£559
Return
found 1 hour ago
Select KLM flight, departing Wed, 2 Dec from Seattle to Lisbon, returning Wed, 9 Dec, priced at £559 found 1 hour ago
Air Canada
Wed, 6 Jan - Wed, 13 Jan
SEA
Seattle
LIS
Lisbon
£560 Return, found 15 hours ago
£560
Return
found 15 hours ago
Select Air Canada flight, departing Wed, 6 Jan from Seattle to Lisbon, returning Wed, 13 Jan, priced at £560 found 15 hours ago
Lufthansa
Wed, 9 Dec - Wed, 16 Dec
SEA
Seattle
LIS
Lisbon
£562 Return, found 1 hour ago
£562
Return
found 1 hour ago
Select Lufthansa flight, departing Wed, 9 Dec from Seattle to Lisbon, returning Wed, 16 Dec, priced at £562 found 1 hour ago
Air France
Wed, 9 Dec - Wed, 16 Dec
SEA
Seattle
LIS
Lisbon
£564 Return, found 1 hour ago
£564
Return
found 1 hour ago
Select Air France flight, departing Wed, 9 Dec from Seattle to Lisbon, returning Wed, 16 Dec, priced at £564 found 1 hour ago
British Airways
Wed, 9 Dec - Wed, 16 Dec
SEA
Seattle
LIS
Lisbon
£569 Return, found 1 hour ago
£569
Return
found 1 hour ago
Select British Airways flight, departing Wed, 9 Dec from Seattle to Lisbon, returning Wed, 16 Dec, priced at £569 found 1 hour ago
Virgin Atlantic
Wed, 9 Dec - Wed, 16 Dec
SEA
Seattle
LIS
Lisbon
£571 Return, found 1 hour ago
£571
Return
found 1 hour ago
Select Virgin Atlantic flight, departing Wed, 9 Dec from Seattle to Lisbon, returning Wed, 16 Dec, priced at £571 found 1 hour ago
Iberia
Wed, 28 Oct - Wed, 4 Nov
SEA
Seattle
LIS
Lisbon
£571 Return, found 16 hours ago
£571
Return
found 16 hours ago
Select Iberia flight, departing Wed, 28 Oct from Seattle to Lisbon, returning Wed, 4 Nov, priced at £571 found 16 hours ago
Aer Lingus
Tue, 13 Oct - Tue, 20 Oct
SEA
Seattle
LIS
Lisbon
£605 Return, found 15 hours ago
£605
Return
found 15 hours ago
Select Aer Lingus flight, departing Tue, 13 Oct from Seattle to Lisbon, returning Tue, 20 Oct, priced at £605 found 15 hours ago

Alternative airports near Lisbon

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

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from £926
LIS
Humberto Delgado
Cheapest
Flights from £926

Find the cheapest month to fly from Seattle (SEA) to Lisbon (LIS)

April is typically the cheapest month to fly

From £342 - £792 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) cost?
You can find one-way and return flights from SEA to LIS with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to LIS ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The cheapest months to fly from SEA to LIS 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Enter SEA to LIS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Condor is one of the cheapest airlines offering connecting return flights from Seattle - Tacoma Intl. (SEA) to Humberto Delgado (LIS), with tickets starting from around £1031 for flights that can be booked for departure within the next year. These prices are per adult in 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 Seattle, WA (SEA) to Lisbon (LIS)?
To find a cheap flight from Seattle, WA (SEA) to Lisbon (LIS), 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
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.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to Humberto Delgado (LIS) typically departs around 12:05 AM local time, operated by American Airlines. This is a seasonal service active in February. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
There are no nonstop flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado). The journey covers a distance of approximately 8,373 kilometres (5,203 miles). Flights with one stop typically take around 16 hours 48 minutes. If you have two or more stops, your travel time will be longer, usually around 19 hours 30 minutes. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.
Can you fly business or first class from Seattle, WA (SEA) to Lisbon (LIS)?
Select the "Business class" and "First class" filters when looking for Seattle, WA (SEA) to Lisbon (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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma 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 Keyâ„¢, you can also earn OneKeyCashâ„¢* 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 (LIS) from Seattle, WA (SEA)?
If you're planning to travel to Lisbon from Seattle - Tacoma Intl. (SEA), you can fly directly into Humberto Delgado (LIS) which offers international flights and connections. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), or Vancouver Intl. (YVR) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma 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 Seattle, WA (SEA) to Lisbon (LIS)?
If you booked your Seattle, WA (SEA) to Lisbon (LIS) 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
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, Alaska Airlines, British Airways, Brussels Airlines, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Return price
£556
Distance
8323 km

Book with confidence

Compare flights from Seattle to Lisbon easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle 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 Seattle - Tacoma 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 Seattle - Tacoma Intl. (SEA) to Humberto Delgado (LIS)

The easiest way to view the best deals on flights from Seattle 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 Seattle - Tacoma Intl. to Humberto Delgado start at just £556 and range up to £605.  

To find an even better deal, try  

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

Why you should book your Seattle to Lisbon flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma 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 Seattle to Lisbon easily and book with confidence

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*Available to Expedia members.