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Cheap flights from Seattle to Lisbon from C$ 465

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
26 Apr — 3 May1
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 27 March 2026.

Tue 17/118:00 a.m.
SEA
-
LIS
1 stop18h 15m
United Airlines
Fri 4/125:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 24/3C$ 905
Thu 31/128:00 a.m.
SEA
-
LIS
1 stop18h 15m
United Airlines
Fri 15/15:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 23/3C$ 906
Thu 31/128:00 a.m.
SEA
-
LIS
1 stop18h 15m
United Airlines
Tue 19/111:20 a.m.
LIS
-
SEA
2 stops32h 20m
United Airlines
Deal found 23/3C$ 909
Wed 30/1211:50 p.m.
SEA
-
LIS
2 stops26h 25m
United Airlines
Sat 16/15:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 23/3C$ 912
Thu 31/125:07 a.m.
SEA
-
LIS
2 stops19h 03m
United Airlines
Sat 16/111:20 a.m.
LIS
-
SEA
2 stops39h 48m
United Airlines
Deal found 22/3C$ 915
Tue 29/121:40 p.m.
SEA
-
LIS
1 stop19h 50m
Delta
Thu 14/15:00 a.m.
LIS
-
SEA
1 stop14h 50m
Delta
Deal found 23/3C$ 919
Mon 20/41:45 p.m.
SEA
-
LIS
2 stops20h 05m
Delta
Tue 28/45:00 a.m.
LIS
-
SEA
1 stop14h 45m
Delta
Deal found 24/3C$ 926
Wed 8/410:48 a.m.
SEA
-
LIS
2 stops27h 57m
United Airlines
Thu 16/45:05 a.m.
LIS
-
SEA
1 stop15h 15m
United Airlines
Deal found 23/3C$ 927
Sun 12/45:35 p.m.
SEA
-
LIS
1 stop21h 15m
KLM
Mon 27/47:45 p.m.
LIS
-
SEA
1 stop24h 00m
KLM
Deal found 23/3C$ 931
Tue 3/111:59 p.m.
SEA
-
LIS
2 stops19h 41m
British Airways
Mon 16/1111:05 a.m.
LIS
-
SEA
1 stop19h 10m
British Airways
Deal found 25/3C$ 933
Mon 20/41:30 p.m.
SEA
-
LIS
1 stop20h 25m
Multiple Airlines
Tue 28/48:25 a.m.
LIS
-
SEA
2 stops22h 13m
Multiple Airlines
Deal found 26/3C$ 938

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 27 March 2026.

Round-trip from

C$ 919

One-way from

C$ 465

Popular in

June

Cheapest in

January

Average price

C$ 921
Delta
  • Delta
  • 21/4-29/4
  • 2 total stops
  • 29h 50m total
  • Seattle to Lisbon
Search Deals
9/5
  • 9/5
  • 3 total stops
  • 33h 50m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 509 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 March 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 27 March 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

Cheapest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 27/4

9:50 a.m.-2:55 p.m.

2 stops21h 05m

Lisbon Humberto Delgado

Tue 5/5

5:00 a.m.-4:30 p.m.

1 stop19h 30m

C$ 926

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 20/4

1:45 p.m.-5:50 p.m.

2 stops20h 05m

Lisbon Humberto Delgado

Tue 28/4

5:00 a.m.-6:26 p.m.

2 stops21h 26m

C$ 939

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 29/4

6:00 a.m.-10:55 a.m.

2 stops20h 55m

Lisbon Humberto Delgado

Wed 6/5

5:00 a.m.-6:28 p.m.

2 stops21h 28m

C$ 945

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 24/8

7:10 p.m.-11:35 p.m.

1 stop20h 25m

Lisbon Humberto Delgado

Wed 23/9

5:55 a.m.-5:15 p.m.

1 stop19h 20m

C$ 959

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 24/8

2:30 p.m.-8:40 p.m.

2 stops22h 10m

Lisbon Humberto Delgado

Wed 23/9

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

2 stops22h 50m

C$ 1,006

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 21/9

7:10 p.m.-9:55 a.m.

1 stop30h 45m

Lisbon Humberto Delgado

Mon 28/9

5:55 a.m.-5:15 p.m.

1 stop19h 20m

C$ 1,014

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 6/5

6:00 a.m.-11:15 a.m.

2 stops21h 15m

Lisbon Humberto Delgado

Wed 13/5

5:00 a.m.-6:48 p.m.

2 stops21h 48m

C$ 1,043

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 19/9

7:10 p.m.-9:50 a.m.

1 stop30h 40m

Lisbon Humberto Delgado

Fri 2/10

5:55 a.m.-5:15 p.m.

1 stop19h 20m

C$ 1,079

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/4

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

2 stops19h 40m

Lisbon Humberto Delgado

Mon 27/4

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

2 stops20h 16m

C$ 1,121
Quickest round-trip

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/4

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

2 stops19h 40m

Lisbon Humberto Delgado

Sat 2/5

9:50 a.m.-9:52 p.m.

2 stops20h 02m

C$ 1,130

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/3

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 13 March 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$ 480). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,353). 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?

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 27 March 2026.
See what other customers who have flown with Turkish Airlines 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
7.4
Good
4,282 reviews
Check prices

Boarding

7.3

Entertainment

7.5

Comfort

7.3

Food

7.5

Overall

7.4

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Cathy,Mar 2026

DFW - ATH

I really enjoyed the food . It's just too hard to eat in such a confined space. Baring in mind, I was not in business class. Crew was very friendly.
Turkish Airlines
7.4
Good
4,282 reviews
Turkish Airlines
7.4
Good
4,282 reviews
Check prices

Boarding

7.3

Entertainment

7.5

Comfort

7.3

Food

7.5

Overall

7.4

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Cathy,Mar 2026

DFW - ATH

I really enjoyed the food . It's just too hard to eat in such a confined space. Baring in mind, I was not in business class. Crew was very friendly.

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 17h 10m. Delta provides one of the quickest options available for as low as C$ 995. 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 is the cheapest airline to fly from Seattle to Lisbon round-trip?

    Currently priced at C$ 731, 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. This flight 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$ 480). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,353). 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
Óbidos
Sintra
Costa da Caparica
Setúbal

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Top airline flying from Seattle to Lisbon

Discover the top airline 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 27 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 731AverageC$ 752FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines 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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