Cheap flights from Baltimore to San Antonio from $122

If you aren’t able to travel during the month of January, then book flights to San Antonio from Baltimore during May instead. Flights to San Antonio in May, while not as cheap as those in January, still average around $439.

The cheapest day to depart on your flight to San Antonio is on a Thursday when prices can be found for as low as $355. 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 $515.

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Baltimore to San Antonio at noon for as low as $309. 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 morning, with an average ticket price of $399. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Baltimore/Washington to San Antonio for the best Baltimore/Washington - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $486 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Baltimore for as low as $270 on momondo.

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

You could potentially save up to 22% on your flight if you consider stops on a Baltimore to San Antonio flight.

As of August 2026, prices for Baltimore to San Antonio flights are approximately 72% more expensive when compared to flights at the same time last year.

Southwest and Delta are the most popular carriers operating from Baltimore/Washington to San Antonio

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to San Antonio from Baltimore according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 7 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.