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Cheap flights from Seattle to Lisbon from C$ 545

SEA — LIS
9 Nov — 16 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

Mon 7/122:35 p.m. -
1 stop14h 15m
Tue 15/122:00 p.m. -
1 stop35h 00m
Deal found 8/10C$ 1,091
Tue 8/124:05 p.m. -
1 stop15h 05m
Mon 14/1211:30 a.m. -
1 stop32h 20m
Deal found 8/10C$ 1,107
Tue 3/114:05 p.m. -
1 stop17h 25m
Tue 10/115:00 a.m. -
1 stop14h 47m
Deal found 7/10C$ 1,108
Tue 1/128:09 a.m. -
1 stop17h 56m
Tue 8/126:05 a.m. -
2 stops20h 17m
Deal found 8/10C$ 1,109
Tue 8/1211:33 p.m. -
2 stops23h 22m
Thu 17/125:00 a.m. -
1 stop15h 00m
Deal found 8/10C$ 1,111
Sun 8/1110:56 p.m. -
2 stops25h 14m
Wed 18/115:00 a.m. -
1 stop15h 00m
Deal found 8/10C$ 1,112
Mon 7/1210:55 p.m. -
2 stops34h 35m
Mon 14/1211:30 a.m. -
1 stop32h 20m
Deal found 8/10C$ 1,114
Wed 9/127:00 a.m. -
2 stops17h 10m
Fri 18/126:00 a.m. -
1 stop15h 00m
Deal found 8/10C$ 1,115
Sat 5/1211:25 p.m. -
1 stop24h 45m
Thu 14/15:00 a.m. -
1 stop15h 00m
Deal found 7/10C$ 1,124
Sat 5/123:48 p.m. -
1 stop32h 12m
Fri 15/15:00 a.m. -
1 stop14h 49m
Deal found 7/10C$ 1,125
Wed 4/116:00 a.m. -
2 stops21h 20m
Wed 11/115:00 a.m. -
2 stops19h 30m
Deal found 7/10C$ 1,128

Find flight deals from Seattle to Lisbon

Round-trip from

C$ 1,025

One-way from

C$ 545

Popular in

June

Cheapest in

January

Average price

C$ 1,242
KLM
  • KLM
  • 21/1-31/1
  • 2 total stops
  • 36h 47m total
  • Seattle to Lisbon
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British Airways
  • British Airways
  • 17/3-31/12
  • 1 total stop
  • 15h 00m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (C$ 638 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 October 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.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Wed 17/3

7:45 p.m.-5:45 p.m.

1 stop15h 00m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 545

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$ 675

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 27/12

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

1 stop24h 40m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 846
Quickest round-trip

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 20/10

8:20 p.m.-5:55 p.m.

1 stop13h 35m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 879

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 8/11

10:56 p.m.-8:10 a.m.

2 stops25h 14m

Lisbon Humberto Delgado

Wed 18/11

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

1 stop15h 00m

C$ 1,112

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Tue 5/1

11:45 a.m.-5:30 p.m.

2 stops21h 45m

Lisbon Humberto Delgado

Wed 13/1

5:00 a.m.-11:49 a.m.

1 stop14h 49m

C$ 1,121

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Mon 9/11

8:30 a.m.-9:20 p.m.

3 stops28h 50m

Lisbon Humberto Delgado

Wed 31/12

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

Nonstop0h 00m

C$ 1,158

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Sun 17/1

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

2 stops15h 40m

Lisbon Humberto Delgado

Thu 21/1

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

1 stop15h 00m

C$ 1,178

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 10/12

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

1 stop17h 10m

Lisbon Humberto Delgado

Fri 18/12

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

1 stop15h 00m

C$ 1,181

SeattleLisbon

SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado

SEALIS

Seattle/Tacoma Intl

Thu 10/12

7:00 a.m.-10:20 a.m.

2 stops19h 20m

Lisbon Humberto Delgado

Thu 17/12

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

1 stop15h 00m

C$ 1,183

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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

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$ 702). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,763). 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$ 1,122 and C$ 1,433 in January.
The cheapest round-trip price found within the last 5 days was C$ 1,025 on KLM (21 Jan-31 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 15h 40m. United Airlines provides one of the quickest options available for as low as C$ 1,178. 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$ 702). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,763). 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
Sintra
Fátima
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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