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Cheap flights from Seattle to Lisbon from C$ 531

SEA — LIS
30 Sep — 7 Oct1
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

Sun 8/118:09 a.m. -
1 stop17h 56m
Wed 18/115:00 a.m. -
1 stop15h 00m
Deal found 29/8C$ 1,034
Sun 13/126:50 a.m. -
1 stop17h 20m
Thu 24/125:00 a.m. -
1 stop15h 00m
Deal found 28/8C$ 1,036
Mon 23/113:25 p.m. -
1 stop15h 45m
Wed 2/1211:30 a.m. -
1 stop32h 20m
Deal found 30/8C$ 1,037
Wed 21/107:00 a.m. -
2 stops18h 20m
Thu 5/115:00 a.m. -
1 stop15h 00m
Deal found 26/8C$ 1,040
Sun 13/128:30 a.m. -
2 stops17h 35m
Wed 23/125:00 a.m. -
1 stop15h 00m
Deal found 28/8C$ 1,041
Sun 22/1111:15 p.m. -
2 stops24h 45m
Wed 2/1211:30 a.m. -
1 stop32h 20m
Deal found 30/8C$ 1,043
Sat 12/1211:43 p.m. -
2 stops25h 37m
Wed 23/125:00 a.m. -
1 stop15h 00m
Deal found 28/8C$ 1,047
Sat 12/1211:43 p.m. -
1 stop24h 27m
Thu 24/125:00 a.m. -
1 stop15h 00m
Deal found 28/8C$ 1,051
Sat 21/1110:52 p.m. -
2 stops34h 38m
Thu 3/1211:30 a.m. -
1 stop32h 20m
Deal found 30/8C$ 1,058
Sun 13/126:50 a.m. -
1 stop17h 20m
Tue 22/1212:20 p.m. -
1 stop31h 40m
Deal found 28/8C$ 1,064
Sat 10/103:40 p.m. -
3 stops32h 50m
Fri 23/108:05 p.m. -
3 stops32h 35m
Deal found 28/8C$ 1,068

Find flight deals from Seattle to Lisbon

Round-trip from

C$ 1,016

One-way from

C$ 531

Popular in

June

Cheapest in

January

Average price

C$ 1,301
Icelandair
  • Icelandair
  • 13/1-26/1
  • 2 total stops
  • 27h 40m total
  • Seattle to Lisbon
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British Airways
  • British Airways
  • 2/12
  • 1 total stop
  • 15h 00m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (C$ 625 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

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Route

Depart

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Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 9/2

6:50 a.m.-8:10 a.m.

1 stop17h 20m

Lisbon Humberto Delgado

Wed 24/2

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

1 stop15h 00m

C$ 1,044
Quickest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 24/11

4:05 p.m.-3:10 p.m.

1 stop15h 05m

Lisbon Humberto Delgado

Tue 1/12

5:00 a.m.-11:50 a.m.

1 stop14h 50m

C$ 1,102

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 12/12

12:20 p.m.-8:10 a.m.

1 stop35h 50m

Lisbon Humberto Delgado

Sun 20/12

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

1 stop15h 00m

C$ 1,121

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 23/11

7:35 p.m.-9:20 a.m.

2 stops29h 45m

Lisbon Humberto Delgado

Tue 1/12

6:05 a.m.-8:20 p.m.

2 stops22h 15m

C$ 1,122

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

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.-4:37 p.m.

2 stops19h 37m

C$ 1,134

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Fri 16/10

7:15 a.m.-10:55 a.m.

2 stops19h 40m

Lisbon Humberto Delgado

Wed 28/10

5:00 a.m.-8:04 p.m.

2 stops22h 04m

C$ 1,176

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 10/10

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

1 stop27h 16m

Lisbon Humberto Delgado

Fri 23/10

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

1 stop15h 15m

C$ 1,261

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 10/10

5:07 p.m.-9:20 a.m.

2 stops32h 13m

Lisbon Humberto Delgado

Fri 23/10

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

1 stop15h 15m

C$ 1,264

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 30/9

7:15 a.m.-10:55 a.m.

2 stops19h 40m

Lisbon Humberto Delgado

Tue 13/10

5:00 a.m.-4:37 p.m.

2 stops19h 37m

C$ 1,286

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 6/10

8:25 a.m.-10:30 a.m.

1 stop18h 05m

Lisbon Humberto Delgado

Sat 17/10

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

1 stop15h 15m

C$ 1,342

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/8

Showing 1-10 of 22 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

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$ 669). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,709). 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$ 1,089 and C$ 1,554 in January.
The cheapest round-trip price found within the last 5 days was C$ 1,016 on Icelandair (9 Jan-26 Jan).

Related info for your journey

  • How long is the flight from Seattle to Lisbon?

    A quick flight from Seattle to Lisbon can take about 19h. Delta provides one of the quickest options available for as low as C$ 1,108. 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$ 669). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,709). 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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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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