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Cheap flights from Seattle to Lisbon from C$ 437

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
28 Mar — 4 Apr1
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 26 February 2026.

Tue 21/41:35 p.m.
SEA
-
LIS
1 stop25h 25m
Multiple Airlines
Sat 2/56:35 a.m.
LIS
-
SEA
2 stops24h 03m
Multiple Airlines
Deal found 23/2C$ 676
Sun 25/1011:50 p.m.
SEA
-
LIS
2 stops25h 20m
United Airlines
Mon 9/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 23/2C$ 679
Sat 24/1010:10 p.m.
SEA
-
LIS
1 stop29h 05m
United Airlines
Wed 11/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 23/2C$ 680
Wed 22/41:35 p.m.
SEA
-
LIS
1 stop20h 20m
British Airways
Thu 30/411:05 a.m.
LIS
-
SEA
1 stop18h 18m
British Airways
Deal found 24/2C$ 686
Wed 22/411:59 p.m.
SEA
-
LIS
2 stops38h 46m
United Airlines
Wed 29/46:15 a.m.
LIS
-
SEA
2 stops20h 20m
United Airlines
Deal found 25/2C$ 691
Tue 10/38:00 a.m.
SEA
-
LIS
1 stop19h 15m
United Airlines
Wed 18/36:10 a.m.
LIS
-
SEA
2 stops21h 46m
United Airlines
Deal found 23/2C$ 693
Sun 26/41:19 p.m.
SEA
-
LIS
2 stops26h 06m
Finnair
Wed 6/56:35 a.m.
LIS
-
SEA
2 stops24h 03m
Finnair
Deal found 24/2C$ 695
Sun 12/48:20 p.m.
SEA
-
LIS
1 stop35h 25m
British Airways
Sat 25/46:55 p.m.
LIS
-
SEA
1 stop24h 40m
British Airways
Deal found 25/2C$ 698
Sun 12/48:20 p.m.
SEA
-
LIS
1 stop35h 25m
British Airways
Tue 28/46:45 p.m.
LIS
-
SEA
1 stop24h 50m
British Airways
Deal found 26/2C$ 701
Mon 27/48:20 p.m.
SEA
-
LIS
1 stop18h 50m
Multiple Airlines
Fri 8/56:35 a.m.
LIS
-
SEA
2 stops24h 03m
Multiple Airlines
Deal found 26/2C$ 703
Sun 19/48:20 p.m.
SEA
-
LIS
1 stop18h 45m
Multiple Airlines
Tue 5/56:45 p.m.
LIS
-
SEA
2 stops32h 51m
Multiple Airlines
Deal found 25/2C$ 705

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 26 February 2026.

Round-trip from

C$ 676

One-way from

C$ 437

Popular in

June

Cheapest in

January

Average price

C$ 766
Finnair
  • Finnair
  • 27/4-8/5
  • 3 total stops
  • 42h 53m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 20/7
  • 1 total stop
  • 18h 50m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 508 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 26 February 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

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 22/4

1:35 p.m.-11:15 p.m.

1 stop25h 40m

Lisbon Humberto Delgado

Thu 30/4

11:05 a.m.-10:38 p.m.

2 stops19h 33m

C$ 713

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 14/4

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Mon 27/4

5:00 a.m.-5:16 p.m.

2 stops20h 16m

C$ 754

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

7:15 a.m.-11:15 a.m.

2 stops20h 00m

Lisbon Humberto Delgado

Tue 28/4

5:00 a.m.-5:16 p.m.

2 stops20h 16m

C$ 761

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

5:35 p.m.-10:50 p.m.

1 stop21h 15m

Lisbon Humberto Delgado

Sat 2/5

7:45 p.m.-11:42 a.m.

1 stop23h 57m

C$ 813

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Sat 2/5

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

1 stop13h 40m

C$ 816

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 25/8

11:10 a.m.-3:45 p.m.

2 stops20h 35m

Lisbon Humberto Delgado

Wed 16/9

7:15 a.m.-10:05 p.m.

2 stops22h 50m

C$ 854

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/4

5:35 p.m.-10:50 p.m.

1 stop21h 15m

Lisbon Humberto Delgado

Sat 2/5

7:45 p.m.-11:42 a.m.

1 stop23h 57m

C$ 877

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 25/8

11:10 a.m.-3:45 p.m.

2 stops20h 35m

Lisbon Humberto Delgado

Fri 4/9

7:00 a.m.-10:17 p.m.

2 stops23h 17m

C$ 950

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 24/8

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

1 stop19h 00m

Lisbon Humberto Delgado

Wed 23/9

5:05 a.m.-6:32 p.m.

2 stops21h 27m

C$ 1,059

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 17/3

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

2 stops18h 10m

C$ 547

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/2

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Lisbon. Price data was last updated on 20 February 2026.

Booking 81 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$ 475). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,351). 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.

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated 26 February 2026.
See what other customers who have flown with Turkish Airlines and British Airways from Seattle to Lisbon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Turkish Airlines
7.3
Good
4,237 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.5

Comfort

7.3

Food

7.5

Overall

7.3

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you
Turkish Airlines
7.3
Good
4,237 reviews
Turkish Airlines
7.3
Good
4,237 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.5

Comfort

7.3

Food

7.5

Overall

7.3

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you
British Airways
6.7
Okay
7,768 reviews
Turkish Airlines
7.3
Good
4,237 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.5

Comfort

7.3

Food

7.5

Overall

7.3

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you

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 15h 10m. British Airways provides one of the quickest options available for as low as C$ 754. 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.

  • What are the cheapest airlines flying from Seattle to Lisbon round-trip?

    Currently priced at C$ 723, Turkish Airlines will fly you from Seattle to Lisbon and back. In addition to Turkish Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on British Airways for as low as C$ 931. These flights start at 35% lower than the current average price 3 months from now.

  • 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$ 475). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,351). 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
Costa da Caparica
Setúbal

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Seattle to Lisbon

Discover the top 2 airlines that operate flights from Seattle to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 26 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 723AverageC$ 744FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 931AverageC$ 1,370FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Lisbon?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Lisbon from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Lisbon?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Lisbon by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Lisbon with no change fees?

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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