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Cheap flights from Seattle to Lisbon from C$ 542

SEA — LIS
29 Oct — 5 Nov1
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 1/117:15 a.m. -
2 stops19h 15m
Wed 11/1111:15 a.m. -
1 stop15h 51m
Deal found 24/9C$ 915
Mon 26/108:09 a.m. -
1 stop19h 11m
Wed 11/115:00 a.m. -
1 stop15h 00m
Deal found 27/9C$ 1,048
Tue 27/108:09 a.m. -
1 stop18h 56m
Thu 12/115:00 a.m. -
1 stop15h 00m
Deal found 25/9C$ 1,052
Wed 4/113:25 p.m. -
1 stop18h 05m
Mon 9/1111:30 a.m. -
1 stop32h 17m
Deal found 28/9C$ 1,054
Tue 27/108:30 a.m. -
2 stops16h 40m
Fri 6/116:00 a.m. -
1 stop15h 00m
Deal found 25/9C$ 1,055
Tue 10/118:09 a.m. -
1 stop17h 56m
Tue 17/1112:50 p.m. -
2 stops31h 29m
Deal found 27/9C$ 1,057
Mon 9/117:35 p.m. -
2 stops29h 45m
Wed 25/115:00 a.m. -
1 stop15h 00m
Deal found 27/9C$ 1,058
Sun 8/1111:59 p.m. -
2 stops24h 11m
Wed 18/115:00 a.m. -
1 stop15h 00m
Deal found 28/9C$ 1,059
Wed 28/109:42 a.m. -
2 stops24h 48m
Wed 11/1111:30 a.m. -
1 stop32h 17m
Deal found 25/9C$ 1,061
Sat 7/1110:56 p.m. -
2 stops25h 14m
Fri 27/116:00 a.m. -
1 stop15h 00m
Deal found 27/9C$ 1,062
Sat 31/1010:56 p.m. -
2 stops27h 24m
Thu 12/115:00 a.m. -
1 stop15h 00m
Deal found 25/9C$ 1,064

Find flight deals from Seattle to Lisbon

Round-trip from

C$ 915

One-way from

C$ 542

Popular in

June

Cheapest in

January

Average price

C$ 1,379
Delta
  • Delta
  • 1/11-11/11
  • 3 total stops
  • 35h 06m total
  • Seattle to Lisbon
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British Airways
  • British Airways
  • 22/2-31/12
  • 1 total stop
  • 33h 20m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (C$ 645 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 70 potential savings vs. average RT price).
Search Deals
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

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Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 23/3

7:45 p.m.-9:50 p.m.

1 stop19h 05m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 542

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 21/2

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

1 stop31h 00m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 542

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 12/1

6:45 p.m.-2:55 p.m.

1 stop36h 10m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 542

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 24/3

3:50 p.m.-11:30 p.m.

1 stop24h 40m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 554

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 9/3

8:30 a.m.-6:55 a.m.

3 stops38h 25m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 555

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 24/3

7:20 a.m.-10:30 a.m.

2 stops20h 10m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 562

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 18/3

7:45 p.m.-9:55 p.m.

1 stop19h 10m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 613

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 25/2

1:40 p.m.-10:00 a.m.

1 stop36h 20m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 613

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sat 7/11

11:17 p.m.-8:10 a.m.

1 stop24h 53m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 678

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 25/11

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

1 stop15h 45m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 778

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/9

Showing 1-10 of 23 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$ 673). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,753). 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$ 1,102 and C$ 1,419 in November.
The cheapest round-trip price found within the last 5 days was C$ 915 on Delta (1 Nov-11 Nov).

Related info for your journey

  • How long is the flight from Seattle to Lisbon?

    A quick flight from Seattle to Lisbon can take about 17h 40m. United Airlines provides one of the quickest options available for as low as C$ 1,052. 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$ 673). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,753). 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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