$813+ Cheap flights from Washington to San Sebastian (EAS)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EAS
Jan 17 — Jan 241
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Washington 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 Washington to San Sebastian
Best flights from Washington to San SebastianDiscover carefully curated flight deals from Washington to San Sebastian that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.
Discover carefully curated flight deals from Washington to San Sebastian that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.
This Iberia deal was found by Cheapflights users on 12/15. 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 2/66:50 pmSEA - EAS
2 stops17h 00mIberia
Tue 2/109:30 pmEAS - SEA
2 stops33h 17mIberia
Deal found 12/15![Iberia logo]()
$813
This AranGrant deal was found by Cheapflights users on 12/16. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:20 pmSEA - EAS
2 stops27h 20mIberia
Fri 6/51:40 pmEAS - SEA
2 stops20h 04mIberia
Deal found 12/16![Iberia logo]()
$4,585
Find flight deals from Washington to San Sebastian
Keep the following information in mind while searching for Washington to San Sebastian flight deals. Data was last updated December 18, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $813 (Iberia) |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington 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 December 18, 2025.
Use the filters below to find and compare flights from Washington to San Sebastian that are best for you.
Fly from
Washington
Fly to
San Sebastian
Route
Depart
Return
Price
SeattleSan Sebastian
SEA - EAS
SEAEAS
Seattle/Tacoma Intl
Fri 2/6
6:50 pm-8:50 pm
2 stops17h 00m
San Sebastián
Tue 2/10
9:30 pm-9:47 pm
2 stops33h 17m
$813
SeattleSan Sebastian
SEA - EAS
SEAEAS
Seattle/Tacoma Intl
Thu 4/16
8:20 pm-8:40 am
2 stops27h 20m
San Sebastián
Fri 6/5
1:40 pm-12:44 am
2 stops20h 04m
$4,585
Best time to book a flight from Washington to San Sebastian
Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Washington 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 Washington to San Sebastian
What is the cheapest month to book a flight from State of Washington to San Sebastian?
Currently, January is the cheapest month in which you can book a flight from State of Washington to San Sebastian (average of $484). Flying from State of Washington to San Sebastian in June is currently the most expensive (average of $1,288). 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.
What is the cheapest time of day to fly from WA to EAS?
Find hourly flight availability from Washington 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 December 18, 2025.
It’s typically best to fly out from State of Washington to San Sebastian at noon. Doing so could potentially save you 41% on the flight price compared to flying in the morning, which is usually more expensive.