How do I get Price Alerts for flights from St. Louis to San Sebastian?

Price Alerts will notify you by email when the price for flights to San Sebastian from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How can I save money on flights from St. Louis to San Sebastian with momondo?

By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

When did momondo last update prices for flights from Lambert-St Louis Airport to San Sebastián Airport?

Prices for flights from Lambert-St Louis Airport to San Sebastián Airport were last updated today.

How old do you have to be to fly from Lambert-St Louis Airport to San Sebastián Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to San Sebastián Airport.

What documentation or ID do you need to fly to San Sebastián Airport?

The necessary travel and health documents for your San Sebastián Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$623 Cheap Flights from St. Louis to San Sebastian in 2025/26

1 adult

0 bags

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Find the cheapest flights from St. Louis to San Sebastian

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:25 am - 1:00 pm

STL

EAS

20h 35m2 stops

9:20 am - 10:44 pm

EAS

STL

20h 24m2 stops

$810Iberia

Wed, Feb 4 - Sun, Feb 8

11:55 am - 1:00 pm

STL

EAS

42h 05m2 stops

9:20 am - 10:59 pm

EAS

STL

20h 39m2 stops

$816Iberia

Wed, Feb 4 - Sun, Feb 8

2:54 pm - 1:00 pm

STL

EAS

15h 06m2 stops

9:30 pm - 10:59 pm

EAS

STL

32h 29m2 stops

$821Iberia

Wed, Feb 4 - Sun, Feb 8

Iberia flights from St. Louis to San Sebastian

Our best Iberia deals on St. Louis to San Sebastian flight tickets

Iberia

Feb 4

STL9:25 amLambert-St Louis

20h 35m

2 stops

EAS1:00 pmSan Sebastián

Feb 8

EAS9:20 amSan Sebastián

20h 24m

2 stops

STL10:44 pmLambert-St Louis

$810

Find similar

Iberia

Feb 4

STL11:55 amLambert-St Louis

42h 05m

2 stops

EAS1:00 pmSan Sebastián

Feb 8

EAS9:20 amSan Sebastián

20h 39m

2 stops

STL10:59 pmLambert-St Louis

$816

Find similar

Iberia

Feb 4

STL2:54 pmLambert-St Louis

15h 06m

2 stops

EAS1:00 pmSan Sebastián

Feb 8

EAS9:30 pmSan Sebastián

32h 29m

2 stops

STL10:59 pmLambert-St Louis

$821

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Wed 2/4

9:25 am-1:00 pm

2 stops20h 35m

San Sebastián

Sun 2/8

9:20 am-10:44 pm

2 stops20h 24m

$810

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Wed 2/4

11:55 am-1:00 pm

2 stops42h 05m

San Sebastián

Sun 2/8

9:20 am-10:59 pm

2 stops20h 39m

$816

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Wed 2/4

2:54 pm-1:00 pm

2 stops15h 06m

San Sebastián

Sun 2/8

9:30 pm-10:59 pm

2 stops32h 29m

$821

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to San Sebastian (STL to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to San Sebastian

Fastest flight time	15h 23m
Direct flights	None

The fastest flight from St. Louis to San Sebastian takes 15h 23m

There are no direct flights from St. Louis to San Sebastian. There are no popular flight routes from St. Louis to San Sebastian.

Search flight deals

How far is Lambert-St Louis to San Sebastián by plane?
There are 4385.9 mi between Lambert-St Louis and San Sebastián. In terms of flight time, this usually takes a little over 15h 23m.
When did momondo last update prices for flights from Lambert-St Louis Airport to San Sebastián Airport?
Prices for flights from Lambert-St Louis Airport to San Sebastián Airport were last updated today.
How old do you have to be to fly from Lambert-St Louis Airport to San Sebastián Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to San Sebastián Airport.
What documentation or ID do you need to fly to San Sebastián Airport?
The necessary travel and health documents for your San Sebastián Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from St. Louis to San Sebastian?
Price Alerts will notify you by email when the price for flights to San Sebastian from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from St. Louis to San Sebastian with momondo?
By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Irun

Hondarribia

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to San Sebastian?

Finding the right flight to San Sebastian from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Sebastian quick and easy, saving you time and money.

Can I find flights from St. Louis to San Sebastian with flexible booking policies on momondo?

Flights from St. Louis to San Sebastian with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to San Sebastian?

momondo provides multiple filters to help you find the best flight to San Sebastian from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to San Sebastian right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to San Sebastian flights. All you need is a valid email address and we will do the rest; it is that quick and easy.