Find flights
When to book
FAQs

Cheap flights from Seattle to Lisbon from C$ 505

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
30 Aug — 6 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Lisbon

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Lisbon
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 31 July 2026.

Tue 10/118:30 a.m.
SEA
-
LIS
3 stops38h 25m
United Airlines
Thu 26/1110:55 a.m.
LIS
-
SEA
2 stops40h 08m
United Airlines
Deal found 30/7C$ 1,058
Sun 8/119:42 a.m.
SEA
-
LIS
2 stops21h 28m
Delta
Wed 18/115:00 a.m.
LIS
-
SEA
2 stops19h 33m
Delta
Deal found 28/7C$ 1,072
Tue 13/107:00 a.m.
SEA
-
LIS
1 stop17h 20m
United Airlines
Wed 28/105:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 28/7C$ 1,093
Mon 14/123:25 p.m.
SEA
-
LIS
1 stop15h 45m
Delta
Fri 25/125:30 a.m.
LIS
-
SEA
1 stop17h 43m
Delta
Deal found 29/7C$ 1,096
Tue 22/96:45 p.m.
SEA
-
LIS
1 stop15h 05m
Delta
Tue 22/125:30 a.m.
LIS
-
SEA
1 stop16h 20m
Delta
Deal found 30/7C$ 1,097
Tue 13/107:15 a.m.
SEA
-
LIS
2 stops20h 00m
Delta
Wed 28/105:00 a.m.
LIS
-
SEA
2 stops18h 37m
Delta
Deal found 29/7C$ 1,107
Wed 23/96:50 p.m.
SEA
-
LIS
1 stop19h 55m
United Airlines
Tue 22/126:10 a.m.
LIS
-
SEA
2 stops26h 23m
United Airlines
Deal found 28/7C$ 1,113

Find 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 31 July 2026.

Round-trip from

C$ 1,024

One-way from

C$ 505

Popular in

June

Cheapest in

January

Average price

C$ 1,691
Icelandair
  • Icelandair
  • 6/1-19/1
  • 2 total stops
  • 27h 40m total
  • Seattle to Lisbon
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 40h 05m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (C$ 666 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 74 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 31 July 2026.
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

Cheapest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 14/12

3:25 p.m.-3:10 p.m.

1 stop15h 45m

Lisbon Humberto Delgado

Fri 25/12

5:30 a.m.-3:13 p.m.

1 stop17h 43m

C$ 1,096
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 28/9

6:45 p.m.-5:50 p.m.

1 stop15h 05m

Lisbon Humberto Delgado

Wed 21/10

5:00 a.m.-11:52 a.m.

1 stop14h 52m

C$ 1,128

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 7/10

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Wed 14/10

5:00 a.m.-11:52 a.m.

1 stop14h 52m

C$ 1,135

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 23/9

7:15 a.m.-2:55 p.m.

2 stops23h 40m

Lisbon Humberto Delgado

Fri 2/10

5:00 a.m.-4:35 p.m.

1 stop19h 35m

C$ 1,141

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/9

2:30 p.m.-5:50 p.m.

2 stops19h 20m

Lisbon Humberto Delgado

Fri 2/10

5:00 a.m.-4:44 p.m.

2 stops19h 44m

C$ 1,149

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/9

6:45 p.m.-5:50 p.m.

1 stop15h 05m

Lisbon Humberto Delgado

Sat 10/10

5:00 a.m.-11:52 a.m.

1 stop14h 52m

C$ 1,212

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 7/10

6:50 p.m.-10:45 p.m.

1 stop19h 55m

Lisbon Humberto Delgado

Sun 25/10

5:00 a.m.-1:00 p.m.

1 stop15h 00m

C$ 1,216

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 24/9

6:50 p.m.-10:45 p.m.

1 stop19h 55m

Lisbon Humberto Delgado

Tue 6/10

5:05 a.m.-2:22 p.m.

2 stops17h 17m

C$ 1,223

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 23/9

7:15 a.m.-2:55 p.m.

2 stops23h 40m

Lisbon Humberto Delgado

Sun 4/10

11:55 a.m.-4:35 p.m.

1 stop36h 40m

C$ 1,225
Cheapest one-way

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 18/11

6:45 p.m.-2:45 p.m.

1 stop36h 00m

C$ 535

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Lisbon. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 675). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,745). 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.

How much does it cost to fly round-trip from Seattle to Lisbon?

Airfare is below average for this route at the moment.

Seattle to Lisbon flights typically cost between C$ 1,138 and C$ 1,543 in January.
The cheapest round-trip price found within the last 5 days was C$ 1,024 on Icelandair (6 Jan-19 Jan).

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.

  • How long is the flight from Seattle to Lisbon?

    A quick flight from Seattle to Lisbon can take about 18h 05m. Delta provides one of the quickest options available for as low as C$ 1,051. Seattle and Lisbon are separated by a distance of 8367 km.

  • Can I find deals for flights from Seattle to Lisbon that include hotel bookings?

    Yes. In addition to deals on Seattle to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Lisbon.

  • Can I find deals for business class flights from Seattle to Lisbon?

    Yes. Cheapflights offers flight deals from Seattle to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 C$ 675). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,745). 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.

See more FAQs

Travelling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Sintra
Óbidos
Estoril
Costa da Caparica
Setúbal

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Lisbon?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Lisbon from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Lisbon?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Lisbon by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Lisbon with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Lisbon flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Lisbon become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Lisbon flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.