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Cheap flights from Seattle to Lisbon from C$ 549

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 25/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
13 Aug — 20 Aug1
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 14 July 2026.

Sat 31/103:35 p.m.
SEA
-
LIS
1 stop14h 15m
Icelandair
Tue 17/112:00 p.m.
LIS
-
SEA
1 stop35h 00m
Icelandair
Deal found 12/7C$ 908
Wed 4/117:00 a.m.
SEA
-
LIS
1 stop17h 10m
United Airlines
Wed 18/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 10/7C$ 1,051
Sun 1/112:05 p.m.
SEA
-
LIS
1 stop19h 25m
Delta
Tue 10/115:00 a.m.
LIS
-
SEA
1 stop14h 47m
Delta
Deal found 10/7C$ 1,053
Mon 16/117:00 a.m.
SEA
-
LIS
1 stop17h 10m
United Airlines
Fri 27/116:10 a.m.
LIS
-
SEA
1 stop14h 50m
United Airlines
Deal found 13/7C$ 1,054
Sun 1/117:00 a.m.
SEA
-
LIS
1 stop17h 10m
United Airlines
Tue 17/1112:50 p.m.
LIS
-
SEA
2 stops31h 03m
United Airlines
Deal found 12/7C$ 1,056
Mon 12/1011:13 p.m.
SEA
-
LIS
2 stops26h 07m
Multiple Airlines
Thu 12/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
Multiple Airlines
Deal found 12/7C$ 1,057
Tue 13/108:10 a.m.
SEA
-
LIS
2 stops16h 10m
United Airlines
Thu 12/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 12/7C$ 1,058
Sun 1/119:55 p.m.
SEA
-
LIS
2 stops27h 05m
Delta
Mon 9/1111:30 a.m.
LIS
-
SEA
1 stop32h 17m
Delta
Deal found 10/7C$ 1,060
Sat 31/1010:35 p.m.
SEA
-
LIS
2 stops27h 25m
Delta
Mon 16/1111:30 a.m.
LIS
-
SEA
1 stop32h 17m
Delta
Deal found 12/7C$ 1,061
Sat 14/1111:16 p.m.
SEA
-
LIS
1 stop24h 54m
Multiple Airlines
Wed 25/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
Multiple Airlines
Deal found 10/7C$ 1,068
Sat 31/1011:10 p.m.
SEA
-
LIS
1 stop26h 50m
Delta
Tue 10/115:00 a.m.
LIS
-
SEA
1 stop14h 47m
Delta
Deal found 10/7C$ 1,070
Sat 31/101:40 p.m.
SEA
-
LIS
1 stop36h 20m
Delta
Fri 13/115:00 a.m.
LIS
-
SEA
1 stop14h 47m
Delta
Deal found 12/7C$ 1,071

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 14 July 2026.

Round-trip from

C$ 908

One-way from

C$ 549

Popular in

June

Cheapest in

January

Average price

C$ 1,697
Icelandair
  • Icelandair
  • 31/10-12/11
  • 2 total stops
  • 49h 15m total
  • Seattle to Lisbon
Search Deals
United Airlines
  • United Airlines
  • 25/11
  • 2 total stops
  • 19h 10m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (C$ 677 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 75 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 14 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

Sun 11/10

7:15 a.m.-10:45 a.m.

2 stops19h 30m

Lisbon Humberto Delgado

Thu 12/11

11:30 a.m.-11:47 a.m.

1 stop32h 17m

C$ 1,104

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.-4:35 p.m.

1 stop19h 35m

C$ 1,223

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 18/10

7:00 a.m.-8:20 a.m.

1 stop17h 20m

Lisbon Humberto Delgado

Fri 23/10

5:05 a.m.-12:20 p.m.

1 stop15h 15m

C$ 1,232

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/10

7:15 a.m.-11:15 a.m.

2 stops20h 00m

Lisbon Humberto Delgado

Sun 25/10

5:00 a.m.-8:45 p.m.

2 stops22h 45m

C$ 1,244

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 26/9

11:14 p.m.-10:30 a.m.

1 stop27h 16m

Lisbon Humberto Delgado

Sat 12/12

5:00 a.m.-12:00 p.m.

1 stop15h 00m

C$ 1,268

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 15/9

7:15 p.m.-9:50 a.m.

1 stop30h 35m

Lisbon Humberto Delgado

Tue 29/9

5:55 a.m.-5:20 p.m.

1 stop19h 25m

C$ 1,332

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 9/9

7:15 p.m.-11:45 p.m.

1 stop20h 30m

Lisbon Humberto Delgado

Wed 16/9

10:55 a.m.-5:20 p.m.

1 stop38h 25m

C$ 1,332

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 12/8

8:10 a.m.-10:30 a.m.

1 stop18h 20m

Lisbon Humberto Delgado

Wed 26/8

6:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 1,378

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 24/8

7:00 a.m.-8:20 a.m.

2 stops17h 20m

Lisbon Humberto Delgado

Tue 1/9

1:00 p.m.-11:32 a.m.

2 stops30h 32m

C$ 1,392

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 22/8

11:00 p.m.-8:20 a.m.

2 stops25h 20m

Lisbon Humberto Delgado

Tue 1/9

1:00 p.m.-11:32 a.m.

2 stops30h 32m

C$ 1,392

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 16 resultsSorted by cheapest first
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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$ 688). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,760). 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?

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 17h 55m. Delta provides one of the quickest options available for as low as C$ 1,163. Seattle and Lisbon are separated by a distance of 8367 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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$ 688). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,760). 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

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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.

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