Cheap flights from the United States to San Antonio from $39

If you aren’t able to travel during the month of September, then book flights to San Antonio from United States during July instead. Flights to San Antonio in July, while not as cheap as those in September, still average around $319.

The cheapest day to depart on your flight to San Antonio is on a Thursday when prices can be found for as low as $397. 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 Monday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Monday is $523.

According to our data, the cheapest time of day to fly to San Antonio is in the afternoon. momondo users have found flights departing from United States to San Antonio in the afternoon for as low as $329. 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 $439. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Las Vegas Harry Reid Intl to San Antonio for the best United States - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $415 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from United States for as low as $303 on momondo.

There are 4 cabin classes available to choose from on United States 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, Spirit Airlines, and Sun Country Air are the most popular carriers operating from United States to San Antonio

Delta, Southwest and American Airlines are the top three most popular airlines that fly to San Antonio from United States according to our data. Delta is the first choice among our users, with 32% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 11 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between United States and San Antonio have experienced a delay on any given week. The average delay length over the past 12 months has been 151 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Spirit Airlines have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

78 flights are operational daily from United States to San Antonio as of February 2026. The most popular departure time for this route is 6:00PM, with 44% of flights per day taking off in the evening.

The number of flights available between United States and San Antonio is 547 per week as of February 2026. The most frequent departure day is Fri, with 19% of weekly flights leaving on this day.