$292 Cheap Flights from Seattle (SEA) to Lisbon (LIS)

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

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Cheap Flights from Seattle to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at $292 for one-way flights and $522 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Mon, Jan 11 - Thu, Jan 21
SEA
Seattle
LIS
Lisbon
$522 Roundtrip, found 6 days ago
$522
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Jan 11 from Seattle to Lisbon, returning Thu, Jan 21, priced at $522 found 6 days ago
Lufthansa
Sat, Jan 2 - Sat, Jan 23
SEA
Seattle
LIS
Lisbon
$532 Roundtrip, found 6 days ago
$532
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Sat, Jan 2 from Seattle to Lisbon, returning Sat, Jan 23, priced at $532 found 6 days ago
Scandinavian Airlines
Sat, Aug 22 - Sat, Sep 12
SEA
Seattle
LIS
Lisbon
$584 Roundtrip, found 7 hours ago
$584
Roundtrip
found 7 hours ago
Select Scandinavian Airlines flight, departing Sat, Aug 22 from Seattle to Lisbon, returning Sat, Sep 12, priced at $584 found 7 hours ago
Virgin Atlantic
Thu, Nov 5 - Mon, Nov 16
SEA
Seattle
LIS
Lisbon
$633 Roundtrip, found 5 days ago
$633
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Thu, Nov 5 from Seattle to Lisbon, returning Mon, Nov 16, priced at $633 found 5 days ago
Delta
Wed, Jan 6 - Wed, Jan 27
SEA
Seattle
LIS
Lisbon
$682 Roundtrip, found 2 days ago
$682
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Jan 6 from Seattle to Lisbon, returning Wed, Jan 27, priced at $682 found 2 days ago
British Airways
Mon, Nov 23 - Thu, Dec 3
SEA
Seattle
LIS
Lisbon
$689 Roundtrip, found 1 day ago
$689
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Nov 23 from Seattle to Lisbon, returning Thu, Dec 3, priced at $689 found 1 day ago
Iberia
Tue, Nov 3 - Wed, Nov 11
SEA
Seattle
LIS
Lisbon
$695 Roundtrip, found 2 days ago
$695
Roundtrip
found 2 days ago
Select Iberia flight, departing Tue, Nov 3 from Seattle to Lisbon, returning Wed, Nov 11, priced at $695 found 2 days ago
Icelandair
Mon, Nov 23 - Thu, Dec 3
SEA
Seattle
LIS
Lisbon
$708 Roundtrip, found 1 day ago
$708
Roundtrip
found 1 day ago
Select Icelandair flight, departing Mon, Nov 23 from Seattle to Lisbon, returning Thu, Dec 3, priced at $708 found 1 day ago
United
Tue, Dec 1 - Tue, Dec 8
SEA
Seattle
LIS
Lisbon
$724 Roundtrip, found 18 hours ago
$724
Roundtrip
found 18 hours ago
Select United flight, departing Tue, Dec 1 from Seattle to Lisbon, returning Tue, Dec 8, priced at $724 found 18 hours ago
Air Canada
Mon, Nov 9 - Wed, Nov 25
SEA
Seattle
LIS
Lisbon
$727 Roundtrip, found 7 hours ago
$727
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Mon, Nov 9 from Seattle to Lisbon, returning Wed, Nov 25, priced at $727 found 7 hours ago

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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 $1,506
LIS
Humberto Delgado
Cheapest
Flights from $1,506

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) cost?
You can find cheap one-way flights from $292 and cheap return flights from $522 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) with Expedia. One-way flights typically cost between $418 and $3855, and return flights often range between $704 and $8403. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The cheapest month to fly from SEA to LIS is January 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're 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 flights from Seattle, WA (SEA) to Lisbon (LIS), with round-trip tickets starting from around $1,389. 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.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma 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 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, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) typically departs at around 12:10 AM, operated by American Airlines. This seasonal service is active in March, allowing you to start your journey to Lisbon in the early hours. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Lisbon (LIS) are in the early morning, from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including Delta, United and American Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in Lisbon with plenty of time to explore.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
A flight from SEA to LIS with a layover takes around 16 hours 50 minutes, with the route covering approximately 5,203 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Business class seats are offered on the SEA to LIS route. Airlines that offer business class service on this route include:

  • British Airways
  • Turkish Airlines
  • Lufthansa
  • Delta Air Lines
  • United Airlines
  • Icelandair
  • Air Canada
  • Air France
  • Virgin Atlantic
  • Edelweiss Air

First class is available with United Airlines.
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 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 Seattle - Tacoma Intl. (SEA)?
From Seattle - Tacoma Intl. (SEA), you can fly into Humberto Delgado (LIS) to reach Lisbon. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), 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) Lisbon Vacation Packages 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-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma 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
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$522
Distance
5202 mi

Book with confidence

Seattle to Lisbon Flights

The cheapest times to fly from Seattle to Lisbon

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 Seattle to Lisbon are during the month of January. You can find some of the cheapest flights from Seattle to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Lisbon

Sunday is one of the best days to book for cheap flights from Seattle to Lisbon: 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 Seattle to Lisbon

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 Seattle to Lisbon in 2026. You can also book with separate airlines for your outbound and return journeys, from $292 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 Seattle to Lisbon 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 Seattle to Lisbon 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.

 

Seattle to Lisbon Flights

*Flight schedules are subject to change.

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*Available to One Key members.