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Cheap flights from Seattle to Lisbon from C$ 536

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
23 Aug — 30 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 24 July 2026.

Wed 18/112:35 p.m.
SEA
-
LIS
1 stop14h 15m
Icelandair
Thu 3/122:00 p.m.
LIS
-
SEA
1 stop35h 00m
Icelandair
Deal found 20/7C$ 1,030
Mon 2/118:10 a.m.
SEA
-
LIS
1 stop18h 10m
Multiple Airlines
Tue 10/115:00 a.m.
LIS
-
SEA
2 stops24h 57m
Multiple Airlines
Deal found 20/7C$ 1,047
Mon 2/117:00 a.m.
SEA
-
LIS
1 stop17h 10m
United Airlines
Fri 13/116:10 a.m.
LIS
-
SEA
1 stop14h 50m
United Airlines
Deal found 19/7C$ 1,050
Tue 3/1111:03 p.m.
SEA
-
LIS
2 stops23h 52m
United Airlines
Wed 11/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 19/7C$ 1,052
Sun 8/117:00 a.m.
SEA
-
LIS
1 stop17h 10m
United Airlines
Wed 18/115:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 22/7C$ 1,053
Tue 29/126:50 a.m.
SEA
-
LIS
1 stop17h 20m
United Airlines
Thu 14/15:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 23/7C$ 1,054
Wed 28/107:00 a.m.
SEA
-
LIS
1 stop18h 10m
United Airlines
Fri 6/116:10 a.m.
LIS
-
SEA
1 stop14h 50m
United Airlines
Deal found 22/7C$ 1,056
Mon 28/127:45 a.m.
SEA
-
LIS
1 stop17h 35m
United Airlines
Thu 14/15:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 23/7C$ 1,059
Mon 28/1211:49 p.m.
SEA
-
LIS
2 stops24h 21m
United Airlines
Wed 13/15:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 23/7C$ 1,060
Wed 30/127:00 a.m.
SEA
-
LIS
2 stops17h 55m
United Airlines
Wed 13/15:00 a.m.
LIS
-
SEA
1 stop15h 00m
United Airlines
Deal found 23/7C$ 1,066
Wed 28/107:00 a.m.
SEA
-
LIS
2 stops16h 55m
United Airlines
Thu 5/1110:55 a.m.
LIS
-
SEA
2 stops32h 58m
United Airlines
Deal found 22/7C$ 1,068

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 24 July 2026.

Round-trip from

C$ 1,030

One-way from

C$ 536

Popular in

June

Cheapest in

January

Average price

C$ 1,693
Icelandair
  • Icelandair
  • 18/11-3/12
  • 2 total stops
  • 49h 15m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 26/10
  • 1 total stop
  • 31h 05m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (C$ 674 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 24 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

Wed 4/11

6:45 p.m.-9:50 p.m.

1 stop19h 05m

Lisbon Humberto Delgado

Mon 9/11

10:35 a.m.-11:25 a.m.

1 stop32h 50m

C$ 1,083

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/11

2:05 p.m.-3:10 p.m.

1 stop17h 05m

Lisbon Humberto Delgado

Mon 9/11

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

1 stop32h 17m

C$ 1,105
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 3/11

7:00 a.m.-8:10 a.m.

1 stop17h 10m

Lisbon Humberto Delgado

Sat 14/11

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

1 stop15h 00m

C$ 1,118

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 29/10

8:10 a.m.-10:20 a.m.

1 stop19h 10m

Lisbon Humberto Delgado

Fri 6/11

6:10 a.m.-1:00 p.m.

1 stop14h 50m

C$ 1,126

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/9

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

1 stop18h 20m

Lisbon Humberto Delgado

Fri 2/10

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

1 stop15h 15m

C$ 1,133

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 31/10

11:16 p.m.-8:10 a.m.

1 stop25h 54m

Lisbon Humberto Delgado

Sun 8/11

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

1 stop15h 00m

C$ 1,140

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 9/11

7:00 a.m.-8:10 a.m.

1 stop17h 10m

Lisbon Humberto Delgado

Sun 15/11

12:25 p.m.-12:00 p.m.

1 stop31h 35m

C$ 1,146

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/11

7:00 a.m.-8:10 a.m.

1 stop17h 10m

Lisbon Humberto Delgado

Sat 7/11

12:25 p.m.-12:00 p.m.

1 stop31h 35m

C$ 1,152

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/10

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

1 stop17h 20m

Lisbon Humberto Delgado

Sun 25/10

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

1 stop15h 00m

C$ 1,218

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

5:35 a.m.-4:50 p.m.

2 stops19h 15m

C$ 1,222

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/7

Showing 1-10 of 19 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$ 677). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,751). 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$ 1,261 and C$ 1,781 in November.
The cheapest round-trip price found within the last 5 days was C$ 1,030 on Icelandair (18 Nov-3 Dec).

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 05m. Delta provides one of the quickest options available for as low as C$ 1,105. 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$ 677). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,751). 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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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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