$124 Find Cheap Flights from St. Louis to San Antonio - Compare and Save

When flying from St. Louis to San Antonio, you should consider leaving on a Saturday and avoid Sundays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

The cheapest month for flights from St. Louis to San Antonio is January, where tickets cost $309 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $439 and $439 respectively.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $439 on average.

To get a below average price on the flight from St. Louis to San Antonio, you should book around 4 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

In the past 5 days, the cheapest round-trip tickets from St. Louis to San Antonio were found on Southwest ($251) and American Airlines ($259).

There is just one airline that flies from St. Louis to San Antonio direct and that is Southwest. The best round-trip deal found from Southwest for the route is $268.

Dallas (DFW) is the top choice – 36% of KAYAK users who clicked on 1-stop flights from St. Louis to San Antonio picked an itinerary connecting there.

Flights via Denver (DEN) offer the most affordable fares, with an average round-trip price of $278.

Consider flying via Dallas (DAL) for the shortest journey. The average one-way travel time for flights connecting there is 4h 03m.

If you prefer a quick connection, Dallas (DAL) often has the shortest layovers from St. Louis to San Antonio, with an average of 1h 08m.

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are between 1 and 2 nonstop flights that take off from St. Louis and land in San Antonio, with an average flight time of 2h 08m. The most common departure time is 8:00 am and most flights take off in the evening. Each week, there are 12 flights. The most frequent day of departure is Monday, when 17% of all weekly flights depart. The fewest flights depart on a Saturday.