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Cheap flights from Seattle to Lisbon from C$ 682

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
9 Jun — 16 Jun1
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 10 May 2026.

Tue 3/116:50 a.m.
SEA
-
LIS
1 stop17h 20m
United Airlines
Fri 13/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 7/5C$ 1,127
Tue 27/108:00 a.m.
SEA
-
LIS
1 stop19h 15m
United Airlines
Fri 6/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 9/5C$ 1,128
Mon 26/1011:50 a.m.
SEA
-
LIS
1 stop14h 10m
KLM
Mon 9/113:35 p.m.
LIS
-
SEA
1 stop28h 12m
KLM
Deal found 9/5C$ 1,129
Sun 1/113:10 p.m.
SEA
-
LIS
1 stop24h 20m
Lufthansa
Wed 11/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
Lufthansa
Deal found 7/5C$ 1,131
Sat 24/1011:50 p.m.
SEA
-
LIS
2 stops25h 20m
United Airlines
Fri 6/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 9/5C$ 1,134
Sat 31/1011:05 p.m.
SEA
-
LIS
2 stops25h 55m
Delta
Mon 9/1111:25 a.m.
LIS
-
SEA
1 stop32h 22m
Delta
Deal found 7/5C$ 1,135
Sun 1/117:20 a.m.
SEA
-
LIS
1 stop16h 40m
Multiple Airlines
Mon 9/116:30 p.m.
LIS
-
SEA
1 stop24h 55m
Multiple Airlines
Deal found 6/5C$ 1,139
Sat 24/109:55 p.m.
SEA
-
LIS
2 stops28h 05m
Delta
Mon 9/1111:25 a.m.
LIS
-
SEA
1 stop32h 22m
Delta
Deal found 9/5C$ 1,143
Sat 31/102:00 p.m.
SEA
-
LIS
1 stop35h 10m
United Airlines
Wed 11/115:00 a.m.
LIS
-
SEA
1 stop15h 10m
United Airlines
Deal found 7/5C$ 1,144
Wed 23/126:05 a.m.
SEA
-
LIS
2 stops18h 55m
Delta
Fri 8/111:15 a.m.
LIS
-
SEA
2 stops31h 11m
Delta
Deal found 5/5C$ 1,164

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 10 May 2026.

Round-trip from

C$ 1,127

One-way from

C$ 682

Popular in

June

Cheapest in

January

Average price

C$ 1,480
United Airlines
  • United Airlines
  • 2/11-10/11
  • 2 total stops
  • 32h 30m total
  • Seattle to Lisbon
Search Deals
Aer Lingus
  • Aer Lingus
  • 6/7
  • 1 total stop
  • 18h 25m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (C$ 541 potential increase over avg. RT price).
Search Deals
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 May 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 10 May 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

Tue 25/8

3:55 p.m.-3:35 p.m.

1 stop15h 40m

Lisbon Humberto Delgado

Wed 16/9

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

2 stops22h 50m

C$ 1,248

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 4/10

1:30 p.m.-5:50 p.m.

1 stop20h 20m

Lisbon Humberto Delgado

Wed 21/10

5:00 a.m.-4:39 p.m.

1 stop19h 39m

C$ 1,258

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 17/8

5:13 p.m.-9:20 a.m.

2 stops32h 07m

Lisbon Humberto Delgado

Wed 26/8

6:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 1,262

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 18/8

5:13 p.m.-9:20 a.m.

2 stops32h 07m

Lisbon Humberto Delgado

Thu 27/8

6:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 1,262

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 18/8

6:05 a.m.-11:15 a.m.

2 stops21h 10m

Lisbon Humberto Delgado

Fri 28/8

5:00 a.m.-11:37 a.m.

1 stop14h 37m

C$ 1,263

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 16/8

6:15 p.m.-9:20 a.m.

2 stops31h 05m

Lisbon Humberto Delgado

Mon 24/8

7:25 a.m.-11:55 a.m.

1 stop36h 30m

C$ 1,306

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 16/8

8:00 a.m.-11:05 a.m.

1 stop19h 05m

Lisbon Humberto Delgado

Sat 22/8

6:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 1,343

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/10

5:00 a.m.-9:20 a.m.

2 stops20h 20m

Lisbon Humberto Delgado

Sat 17/10

5:05 a.m.-12:20 p.m.

1 stop15h 15m

C$ 1,344

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/10

11:50 p.m.-9:20 a.m.

2 stops25h 30m

Lisbon Humberto Delgado

Sat 17/10

5:05 a.m.-12:20 p.m.

1 stop15h 15m

C$ 1,344

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 18/8

5:13 p.m.-9:20 a.m.

2 stops32h 07m

Lisbon Humberto Delgado

Sun 23/8

6:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 1,344

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/5

Showing 1-10 of 18 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?

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$ 1,698). 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 10 May 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
4,357 reviews
Check prices

Food

7.5

Comfort

7.3

Overall

7.4

Entertainment

7.5

Boarding

7.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DEN - IST

The seat assignments that were booked well in advance and paid extra for were all changed and incorrect. This includes the bassinet we requested at time of booking being unavailable and the row we selected not being in the bassinet aisle.
Turkish Airlines
7.4
Good
4,357 reviews
Turkish Airlines
7.4
Good
4,357 reviews
Check prices

Food

7.5

Comfort

7.3

Overall

7.4

Entertainment

7.5

Boarding

7.3

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DEN - IST

The seat assignments that were booked well in advance and paid extra for were all changed and incorrect. This includes the bassinet we requested at time of booking being unavailable and the row we selected not being in the bassinet aisle.

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 20h 20m. Delta provides one of the quickest options available for as low as C$ 1,258. 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$ 722, 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$ 673). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,698). 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
Costa da Caparica
Setúbal

Browse thousands of different options on Cheapflights for your next trip

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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 10 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 722AverageC$ 743FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights

Fly with Cheapflights

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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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