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Cheap flights from Seattle to Lisbon from C$ 540

SEA — LIS
10 Oct — 17 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

Tue 22/99:40 a.m. -
2 stops21h 15m
Fri 2/105:35 a.m. -
1 stop13h 40m
Deal found 9/9C$ 1,006
Wed 16/127:45 a.m. -
1 stop17h 10m
Fri 8/16:00 a.m. -
1 stop15h 00m
Deal found 9/9C$ 1,009
Mon 14/126:50 a.m. -
1 stop17h 20m
Wed 6/111:20 a.m. -
2 stops36h 56m
Deal found 9/9C$ 1,012
Wed 16/127:45 a.m. -
1 stop17h 10m
Wed 6/111:20 a.m. -
2 stops32h 10m
Deal found 9/9C$ 1,016
Mon 5/106:00 a.m. -
2 stops18h 50m
Tue 13/105:00 a.m. -
2 stops19h 45m
Deal found 8/9C$ 1,020
Mon 2/117:24 a.m. -
1 stop17h 36m
Tue 17/1111:30 a.m. -
1 stop32h 17m
Deal found 7/9C$ 1,023
Tue 13/107:25 p.m. -
2 stops31h 05m
Wed 28/1011:55 a.m. -
3 stops38h 22m
Deal found 10/9C$ 1,024
Tue 27/106:30 a.m. -
1 stop18h 40m
Wed 11/115:00 a.m. -
1 stop15h 00m
Deal found 5/9C$ 1,026
Mon 23/113:25 p.m. -
1 stop15h 45m
Wed 2/1211:30 a.m. -
1 stop32h 20m
Deal found 6/9C$ 1,027
Wed 18/118:09 a.m. -
1 stop18h 11m
Fri 27/116:00 a.m. -
1 stop15h 00m
Deal found 6/9C$ 1,029
Mon 16/118:09 a.m. -
1 stop18h 11m
Tue 24/1112:50 p.m. -
2 stops31h 29m
Deal found 6/9C$ 1,030

Find flight deals from Seattle to Lisbon

Round-trip from

C$ 1,006

One-way from

C$ 540

Popular in

June

Cheapest in

January

Average price

C$ 1,340
Delta
  • Delta
  • 22/9-2/10
  • 3 total stops
  • 34h 55m total
  • Seattle to Lisbon
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United Airlines
  • United Airlines
  • 9/3-31/12
  • 3 total stops
  • 31h 04m total
  • Seattle to Lisbon
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Highest demand for flights based on searches. 27% potential increase in price (C$ 617 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 67 potential savings vs. average RT price).
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Average for round-trip flights in September 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

Return

Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 26/10

6:30 a.m.-8:10 a.m.

1 stop18h 40m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 638

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 7/10

7:32 a.m.-2:55 p.m.

2 stops23h 23m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 645

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 7/11

10:59 p.m.-8:00 a.m.

1 stop25h 01m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 656
Quickest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 22/10

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

1 stop18h 05m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 707

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 15/10

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

1 stop19h 55m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 711

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Fri 16/10

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

1 stop19h 55m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 711

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 8/10

1:30 p.m.-11:05 p.m.

1 stop25h 35m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 713

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 8/10

11:13 p.m.-10:30 a.m.

2 stops27h 17m

Lisbon Humberto Delgado

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 721

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 22/9

9:40 a.m.-2:55 p.m.

2 stops21h 15m

Lisbon Humberto Delgado

Fri 2/10

5:35 a.m.-11:15 a.m.

1 stop13h 40m

C$ 1,006

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 13/10

7:25 p.m.-10:30 a.m.

2 stops31h 05m

Lisbon Humberto Delgado

Wed 28/10

11:55 a.m.-7:17 p.m.

3 stops38h 22m

C$ 1,024

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 21 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$ 633). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,694). 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$ 1,075 and C$ 1,544 in September.
The cheapest round-trip price found within the last 5 days was C$ 1,006 on Delta (22 Sep-2 Oct).

Related info for your journey

  • How long is the flight from Seattle to Lisbon?

    A quick flight from Seattle to Lisbon can take about 21h 15m. Delta provides one of the quickest options available for as low as C$ 1,006. 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$ 633). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,694). 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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