Cheap flights from Seattle to Lisbon from £293
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Seattle to Lisbon
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 October 2025.
Find flight deals from Seattle to Lisbon
Cheapest flights from Seattle to LisbonExplore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2025.
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Sat 21/2
08:17-10:15
1 stop17h 58m
Lisbon Humberto Delgado
Sat 28/2
05:00-12:10
1 stop15h 10m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Fri 13/2
12:25-08:55
3 stops36h 30m
Lisbon Humberto Delgado
Sat 21/2
05:00-12:10
1 stop15h 10m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Sun 22/3
19:10-08:10
2 stops30h 00m
Lisbon Humberto Delgado
Sun 29/3
11:25-14:08
2 stops34h 43m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Thu 22/1
08:40-08:10
2 stops15h 30m
Lisbon Humberto Delgado
Mon 9/2
05:00-12:10
1 stop15h 10m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Thu 27/11
07:00-08:10
2 stops17h 10m
Lisbon Humberto Delgado
Sat 6/12
11:20-22:28
2 stops43h 08m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Mon 19/1
08:10-09:20
1 stop17h 10m
Lisbon Humberto Delgado
Sun 8/2
10:50-22:16
1 stop19h 26m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Sun 11/1
08:10-09:20
1 stop17h 10m
Lisbon Humberto Delgado
Mon 19/1
11:20-22:16
1 stop18h 56m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Tue 13/1
13:40-11:20
1 stop13h 40m
Lisbon Humberto Delgado
Sun 25/1
11:25-11:50
1 stop32h 25m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Sun 18/1
14:10-15:10
1 stop17h 00m
Lisbon Humberto Delgado
Tue 10/2
11:25-11:40
1 stop32h 15m
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Thu 22/1
13:40-15:10
1 stop17h 30m
Lisbon Humberto Delgado
Tue 10/2
05:00-11:40
1 stop14h 40m
Best time to book a flight from Seattle to Lisbon
Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Lisbon
How far ahead should I book a flight from Seattle to Lisbon?
The price you pay for your flight from Seattle to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 27 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Seattle to Lisbon?
Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £264). Flying from Seattle to Lisbon in June is currently the most expensive (average of £764). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Lisbon?
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Complete your trip
Complete your trip to Lisbon by adding a car hire and/or hotel booking to your travel itinerary.
Fly with Cheapflights
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How does Cheapflights help users find flights from Seattle to Lisbon?
Cheapflights helps you search for flights from Seattle to Lisbon via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Lisbon?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Lisbon.
Can Cheapflights find flights from Seattle to Lisbon with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Lisbon, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Seattle to Lisbon become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!