S$450 Cheap Flights from Seattle to Lisbon

View S$450 flight on Tue, 3 Feb, 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 to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at S$450 for one-way flights and S$669 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$669 Return, found 5 days ago
S$669
Return
found 5 days ago
Select United flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$669 found 5 days ago
United
Wed, 19 Nov - Thu, 27 Nov
SEA
Seattle
LIS
Lisbon
S$677 Return, found 5 days ago
S$677
Return
found 5 days ago
Select United flight, departing Wed, 19 Nov from Seattle to Lisbon, returning Thu, 27 Nov, priced at S$677 found 5 days ago
Air Canada
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$678 Return, found 5 days ago
S$678
Return
found 5 days ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$678 found 5 days ago
Delta
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$684 Return, found 5 days ago
S$684
Return
found 5 days ago
Select Delta flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$684 found 5 days ago
Virgin Atlantic
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$684 Return, found 5 days ago
S$684
Return
found 5 days ago
Select Virgin Atlantic flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$684 found 5 days ago
United
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$685 Return, found 5 days ago
S$685
Return
found 5 days ago
Select United flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$685 found 5 days ago
Air Canada
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$692 Return, found 5 days ago
S$692
Return
found 5 days ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$692 found 5 days ago
Air Canada
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$693 Return, found 5 days ago
S$693
Return
found 5 days ago
Select Air Canada flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$693 found 5 days ago
United
Wed, 19 Nov - Thu, 27 Nov
SEA
Seattle
LIS
Lisbon
S$697 Return, found 5 days ago
S$697
Return
found 5 days ago
Select United flight, departing Wed, 19 Nov from Seattle to Lisbon, returning Thu, 27 Nov, priced at S$697 found 5 days ago
Lufthansa
Tue, 3 Feb - Fri, 13 Feb
SEA
Seattle
LIS
Lisbon
S$720 Return, found 5 days ago
S$720
Return
found 5 days ago
Select Lufthansa flight, departing Tue, 3 Feb from Seattle to Lisbon, returning Fri, 13 Feb, priced at S$720 found 5 days ago

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

February is typically the cheapest month to fly

From S$591 - S$1,363 per traveller.

Graph displaying average flight prices per month

Seattle to Lisbon route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Return price
S$669
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$669. 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.

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