Cheap flights from San Antonio to Washington, D.C. from $103

The month of February is, on average, the cheapest month to fly to Washington, D.C. from San Antonio, with most prices found around $337. If you’re not able to fly to Washington, D.C. in February, then April is your next best option. Flight prices from San Antonio to Washington, D.C. during April average around $364.

On average, the least expensive day to fly to Washington, D.C. from San Antonio is on a Thursday. momondo users have found tickets for Thursday departures for as low as $423. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Washington, D.C. for around $719.

Fly from San Antonio to Baltimore/Washington for the best San Antonio - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $403 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from San Antonio for as low as $249 on momondo.

There are 4 cabin classes available to choose from on San Antonio to Washington, D.C. 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 4% on your flight if you consider stops on a San Antonio to Washington, D.C. flight.

Frontier, Southwest, and United Airlines are the most popular carriers operating from San Antonio to Washington, D.C.

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to Washington, D.C. from San Antonio according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 7 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

The number of flights available between San Antonio and Washington, D.C. is 7 per day as of November 2026. The most frequent departure time is 12:00PM, with 50% of daily flights leaving in the afternoon.

As of November 2026, 54 flights take off from San Antonio and land in Washington, D.C. each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.