Cheap flights from St. Louis to San Antonio from $89

If you aren’t able to travel during the month of January, then book flights to San Antonio from St. Louis during February instead. Flights to San Antonio in February, while not as cheap as those in January, still average around $336.

The cheapest day to depart on your flight to San Antonio is on a Saturday when prices can be found for as low as $348. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $503.

According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from St. Louis to San Antonio in the evening for as low as $439. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the afternoon, with an average ticket price of $538. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Lambert-St Louis to San Antonio for the best Lambert-St Louis - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $390 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from St. Louis for as low as $244 on momondo.

There is only 1 cabin class available to choose from on St. Louis to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, United Airlines, and Southwest are the most popular carriers operating from Lambert-St Louis to San Antonio

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to San Antonio from St. Louis according to our data. Southwest is the first choice among our users, with 68% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 5 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.