Cheap flights from Houston to San Antonio from $109

If you aren’t able to travel during the month of October, then book flights to San Antonio from Houston during December instead. Flights to San Antonio in December, while not as cheap as those in October, still average around $259.

The cheapest day to depart on your flight to San Antonio is on a Wednesday when prices can be found for as low as $271. 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 $469.

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Houston to San Antonio at noon for as low as $359. 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 $536. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Houston George Bush Intcntl to San Antonio for the best Houston - San Antonio flight prices

The number of flights available between Houston and San Antonio is 17 per day as of August 2026. The most frequent departure time is 8:00PM, with 47% of daily flights leaving in the evening.

As of August 2026, 119 flights take off from Houston and land in San Antonio each week. The most common flight departure day for this route is Wed, with 24% of weekly flights taking off on this day.