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San Sebastian

$651+ Cheap flights from St. Louis (STL) 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EAS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from St. Louis to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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 September 15, 2025.

Round-trip from

$651
(Expedia)
From Lambert-St Louis to San Sebastián
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Find flight deals from St. Louis to San Sebastian

Cheapest flights from St. Louis to San Sebastian
Explore the most affordable flight options available from St. Louis to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Expedia deal was found by Cheapflights users on 9/14. 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.
Wed 10/299:43 amSTL - EAS
2 stops40h 57mIberia
Wed 11/59:30 pmEAS - STL
2 stops30h 25mIberia
Deal found 9/14$651
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Fri 11/78:39 amSTL - EAS
2 stops29h 11mAmerican Airlines
Tue 11/119:20 amEAS - STL
2 stops20h 07mAmerican Airlines
Deal found 9/13$881

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 September 15, 2025.
Use the filters below to find and compare flights from St. Louis to San Sebastian that are best for you.

Fly from

St. Louis

Fly to

San Sebastian

Route

Depart

Return

Price

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Wed 10/29

9:43 am-8:40 am

2 stops40h 57m

San Sebastián

Wed 11/5

9:30 pm-8:55 pm

2 stops30h 25m

$651

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Sat 2/7

11:58 am-8:40 am

2 stops37h 42m

San Sebastián

Sun 2/15

9:30 pm-8:44 am

2 stops42h 14m

$744

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Fri 11/7

8:39 am-8:50 pm

2 stops29h 11m

San Sebastián

Tue 11/11

9:20 am-10:27 pm

2 stops20h 07m

$881

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Sat 2/7

5:23 am-8:40 am

2 stops20h 17m

San Sebastián

Sun 2/15

9:20 am-5:56 pm

2 stops15h 36m

$944

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from St. Louis to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from St. Louis 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.

Related info for your journey

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

    There are many flights that can get you from St. Louis to San Sebastian in 29h 11m. Fly via Iberia or American Airlines to get the fastest option. St. Louis and San Sebastian are separated by a distance of 4395 mi. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from St. Louis to San Sebastian?

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

  • Can I find deals for business class flights from St. Louis to San Sebastian?

    Yes. Cheapflights offers flight deals from St. Louis 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.

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