HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Sebastian

$448+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EAS
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to San Sebastian with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 30, 2025.

Round-trip from

$810
(Iberia)

One-way from

$448
(Kiwi.com)
From Seattle/Tacoma Intl to San Sebastián
Search Deals
One-way flight from Seattle/Tacoma Intl to San Sebastián
Search Deals

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 July 30, 2025.

This Iberia deal was found by Cheapflights users on 7/28. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:10 amSEA - EAS
2 stops30h 40mIberia
Tue 11/49:30 pmEAS - SEA
2 stops34h 54mIberia
Deal found 7/28$822
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Thu 10/3012:34 amSEA - EAS
2 stops36h 16mAmerican Airlines
Tue 11/41:40 pmEAS - SEA
2 stops41h 44mAmerican Airlines
Deal found 7/28$1,060
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/134:20 pmSEA - EAS
2 stops30h 50mMultiple Airlines
Sat 9/209:00 amEAS - SEA
2 stops35h 55mMultiple Airlines
Deal found 7/30$1,114

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 July 30, 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

Fri 10/31

6:10 am-8:50 pm

2 stops30h 40m

San Sebastián

Tue 11/4

9:30 pm-11:24 pm

2 stops34h 54m

$822

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 10/30

12:34 am-8:50 pm

2 stops36h 16m

San Sebastián

Tue 11/4

1:40 pm-10:24 pm

2 stops41h 44m

$1,060

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 9/13

4:20 pm-8:10 am

2 stops30h 50m

San Sebastián

Sat 9/20

9:00 am-11:55 am

2 stops35h 55m

$1,114

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 9/10

10:41 pm-8:20 am

3 stops48h 39m

$448

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 10/25

1:53 pm-9:40 am

2 stops58h 47m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 July 30, 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.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. 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 San Sebastian. Reviews last updated July 30, 2025.
Get a feel of what it's like to fly with Iberia from Seattle to San Sebastian by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Iberia
7.0
Good
2,859 reviews

Food

6.3

Boarding

7.1

Comfort

6.7

Crew

7.6

Overall

7.0

Entertainment

6.6

Reviews

1 / 20
6.0
Good

David,May 2025

JFK - MAD

Unfortunately carry on bag over head was full. I was seated 27J and had to place my carry on by seat 8 .. other then that it was a good flight
Iberia
7.0
Good
2,859 reviews
Iberia
7.0
Good
2,859 reviews

Food

6.3

Boarding

7.1

Comfort

6.7

Crew

7.6

Overall

7.0

Entertainment

6.6

Reviews

1 / 20
6.0
Good

David,May 2025

JFK - MAD

Unfortunately carry on bag over head was full. I was seated 27J and had to place my carry on by seat 8 .. other then that it was a good flight

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.

  • What is the cheapest airline to fly from Seattle to San Sebastian round-trip?

    According to our current data, Iberia ($810), offers the cheapest pricing from Seattle to 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Bilbao flights
Portland to Bilbao flights
Pasco to Bilbao flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.