Cheap flights from Las Vegas to San Antonio from $66

If you aren’t able to travel during the month of September, then book flights to San Antonio from Las Vegas during October instead. Flights to San Antonio in October, while not as cheap as those in September, still average around $151.

The cheapest day to depart on your flight to San Antonio is on a Friday when prices can be found for as low as $146. 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 $237.

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 Las Vegas to San Antonio in the afternoon for as low as $157. 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 evening, with an average ticket price of $176. Departure times in the evening 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 Las Vegas Harry Reid Intl - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $187 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Las Vegas for as low as $98 on momondo.

There are 4 cabin classes available to choose from on Las Vegas Harry Reid Intl 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 is the most popular carrier operating from Las Vegas Harry Reid Intl to San Antonio

Frontier, Southwest and Spirit Airlines are the top three most popular airlines that fly to San Antonio from Las Vegas according to our data. Frontier is the first choice among our users, with 52% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 6 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 3 flights per day flying from Las Vegas to San Antonio. The most common time of day flights depart is 5:00PM, with 47% of flights taking off at noon.

As of February 2026, there are 25 flights per week flying from Las Vegas to San Antonio. The most common day of the week flights depart is Sun, with 32% of flights taking off on this day.