Cheap flights from District of Columbia to San Antonio from $146

If you aren’t able to travel during the month of January, then book flights to San Antonio from District of Columbia during August instead. Flights to San Antonio in August, while not as cheap as those in January, still average around $373.

The cheapest day to depart on your flight to San Antonio is on a Thursday when prices can be found for as low as $384. 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 $528.

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from District of Columbia 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 $421. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Washington, D.C. Reagan-National to San Antonio for the best District of Columbia - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $420 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from District of Columbia for as low as $259 on momondo.

There are 4 cabin classes available to choose from on District of Columbia 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 and Southwest are the most popular carriers operating from District of Columbia to San Antonio

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to San Antonio from District of Columbia according to our data. United Airlines is the first choice among our users, with 46% 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.

As of October 2026, 3 flights take off from District of Columbia and land in San Antonio each day. The most common flight departure time for this route is 6:00PM, with 45% of daily flights taking off in the evening.

23 flights are operational weekly from District of Columbia to San Antonio as of October 2026. The most popular departure day for this route is Fri, with 43% of flights per week taking off on this day.