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$558+ Cheap flights from Seattle (SEA) to San Sebastian (EAS)

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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EAS
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Seattle to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Sebastian (EAS). 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 septiembre 11, 2025.

Round-trip from

$997
(Expedia)

One-way from

$558
(Iberia)
From Seattle/Tacoma Intl to San Sebastián
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One-way flight from Seattle/Tacoma Intl to San Sebastián
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Find flight deals from Seattle to San Sebastian

Cheapest flights from Seattle to San Sebastian
Explore the most affordable flight options available from Seattle to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Expedia deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/257:50 pmSEA - EAS
2 stops28h 50mMultiple Airlines
sáb. 11/19:30 pmEAS - SEA
2 stops36h 28mMultiple Airlines
Deal found 9/10$997
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3012:34 amSEA - EAS
2 stops36h 16mAmerican Airlines
mar. 11/49:20 amEAS - SEA
2 stops22h 58mAmerican Airlines
Deal found 9/9$1,155
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/247:15 amSEA - EAS
2 stops25h 05mMultiple Airlines
sáb. 9/279:00 amEAS - SEA
3 stops20h 40mMultiple Airlines
Deal found 9/10$1,463

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to San Sebastian 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 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from Seattle to San Sebastian that are best for you.

Fly from

Seattle

Fly to

San Sebastian

Route

Depart

Return

Price

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

sáb. 10/25

7:50 pm-8:40 am

2 stops28h 50m

San Sebastián

sáb. 11/1

9:30 pm-1:58 am

2 stops36h 28m

$997

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

vie. 10/31

6:10 am-8:50 pm

2 stops30h 40m

San Sebastián

mar. 11/4

9:20 am-11:18 pm

2 stops22h 58m

$1,155

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

mié. 9/24

7:15 am-5:20 pm

2 stops25h 05m

San Sebastián

sáb. 9/27

9:00 am-8:40 pm

3 stops20h 40m

$1,463

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

sáb. 10/25

6:10 am-2:00 pm

2 stops22h 50m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Seattle to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian 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 San Sebastian

What is the cheapest time of day to fly from SEA to EAS?

Find hourly flight availability from Seattle to San Sebastian. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to San Sebastian as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Sebastian. 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 San Sebastian?

    There are many flights that can get you from Seattle to San Sebastian in 30h 40m. Fly via American Airlines to get the fastest option. There are 5190 mi between Seattle and San Sebastian.

  • Can I find deals for flights from Seattle to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Seattle to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Sebastian.

  • Can I find deals for business class flights from Seattle to San Sebastian?

    Yes. Cheapflights offers flight deals from Seattle to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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