S$454 Cheap Flights from Seattle to Lisbon

View S$454 flight on Sat, 13 Dec, 2025Opens in a new window

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

  • 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 Seattle to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at S$454 for one-way flights and S$674 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 10 Dec - Mon, 22 Dec
SEA
Seattle
LIS
Lisbon
S$674 Return, found 6 hours ago
S$674
Return
found 6 hours ago
Select United flight, departing Wed, 10 Dec from Seattle to Lisbon, returning Mon, 22 Dec, priced at S$674 found 6 hours ago
Air Canada
Wed, 10 Dec - Tue, 23 Dec
SEA
Seattle
LIS
Lisbon
S$683 Return, found 6 hours ago
S$683
Return
found 6 hours ago
Select Air Canada flight, departing Wed, 10 Dec from Seattle to Lisbon, returning Tue, 23 Dec, priced at S$683 found 6 hours ago
United
Wed, 10 Dec - Wed, 24 Dec
SEA
Seattle
LIS
Lisbon
S$689 Return, found 6 hours ago
S$689
Return
found 6 hours ago
Select United flight, departing Wed, 10 Dec from Seattle to Lisbon, returning Wed, 24 Dec, priced at S$689 found 6 hours ago
United
Thu, 11 Dec - Thu, 25 Dec
SEA
Seattle
LIS
Lisbon
S$690 Return, found 6 hours ago
S$690
Return
found 6 hours ago
Select United flight, departing Thu, 11 Dec from Seattle to Lisbon, returning Thu, 25 Dec, priced at S$690 found 6 hours ago
United
Thu, 11 Dec - Tue, 23 Dec
SEA
Seattle
LIS
Lisbon
S$699 Return, found 6 hours ago
S$699
Return
found 6 hours ago
Select United flight, departing Thu, 11 Dec from Seattle to Lisbon, returning Tue, 23 Dec, priced at S$699 found 6 hours ago
Air Canada
Wed, 10 Dec - Sun, 21 Dec
SEA
Seattle
LIS
Lisbon
S$708 Return, found 6 hours ago
S$708
Return
found 6 hours ago
Select Air Canada flight, departing Wed, 10 Dec from Seattle to Lisbon, returning Sun, 21 Dec, priced at S$708 found 6 hours ago
United
Thu, 11 Dec - Sun, 21 Dec
SEA
Seattle
LIS
Lisbon
S$724 Return, found 6 hours ago
S$724
Return
found 6 hours ago
Select United flight, departing Thu, 11 Dec from Seattle to Lisbon, returning Sun, 21 Dec, priced at S$724 found 6 hours ago
Delta
Sat, 13 Dec - Tue, 23 Dec
SEA
Seattle
LIS
Lisbon
S$773 Return, found 6 hours ago
S$773
Return
found 6 hours ago
Select Delta flight, departing Sat, 13 Dec from Seattle to Lisbon, returning Tue, 23 Dec, priced at S$773 found 6 hours ago
Air France
Sat, 13 Dec - Wed, 24 Dec
SEA
Seattle
LIS
Lisbon
S$847 Return, found 6 hours ago
S$847
Return
found 6 hours ago
Select Air France flight, departing Sat, 13 Dec from Seattle to Lisbon, returning Wed, 24 Dec, priced at S$847 found 6 hours ago
Lufthansa
Tue, 16 Dec - Tue, 23 Dec
SEA
Seattle
LIS
Lisbon
S$874 Return, found 6 hours ago
S$874
Return
found 6 hours ago
Select Lufthansa flight, departing Tue, 16 Dec from Seattle to Lisbon, returning Tue, 23 Dec, priced at S$874 found 6 hours ago

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

February is typically the cheapest month to fly

From S$590 - S$1,378 per traveller.

Graph displaying average flight prices per month

Seattle to Lisbon route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Return price
S$674
Distance
8323 km

Flights from Seattle to Lisbon District

There are several airlines that operate frequent flights from Seattle (SEA) to Lisbon (LIS) including

The earliest flight leaves Seattle Tacoma Intl. Airport at 06:15 and arrives at Portela Airport at 05:55. The last flight of the day departs Seattle at 23:25 and arrives at Lisbon at 23:00.

The flight distance from Seattle to Lisbon is about 9504 km, the shortest flight is 13 hours 16 minutes with Virgin Atlantic.

Expedia lets you search across the largest number of airlines and Lisbon District flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle Lisbon District flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle to Lisbon District trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Lisbon District flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to Lisbon District with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to Lisbon/Portela Airport?
Round-trip tickets from SEA to Humberto Delgado Airport (LIS) start from S$674. This is based on fares advertised within the last 7 days on Expedia for flights departing within the next year --- make your booking ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Lisbon/Portela Airport?
We get that things crop up unexpectedly, so we've made it as easy as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to LIS 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 Seattle - Tacoma Intl. Airport (SEA) to Lisbon/Portela Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SEA to LIS?
SeaTac to Lisbon District is around 8,400 kilometres, so get ready to spend quite a while in the air. Don't forget to pack all the essentials, from your headphones to your hoodie. Throw in a few snacks to munch on throughout your trip too.
Which airlines fly direct from Sea-Tac Airport to LIS?
There are no direct flights, so you'll need to make at least one stop between Sea-Tac Airport and LIS. Take advantage of the layover time to stretch your legs and freshen up.
Are SEA to LIS flight tickets cheaper when they're purchased at the last minute?
Booking your trip from SEA to Lisbon/Portela Airport at the last minute could be your ticket to a fantastic deal. However, it might cost you a whole lot more! If you'd prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains as far ahead as 12 months in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.

Explore a world of travel with Expedia

*Available to Expedia members.