Cheap flights from San Antonio to Washington, D.C. from $125

If you’re not able to fly to Baltimore in August, then October is your next best option. Flight prices from San Antonio to Baltimore during October average around $376.

The cheapest day to depart from San Antonio to Baltimore is on a Thursday. Travelers who choose to depart for Baltimore on a Thursday will often find tickets for as low as $429. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $501. These prices are subject to change though, so be sure to set up a Price Alert for flights to Baltimore.

Flying to Baltimore from San Antonio in the evening is the least expensive time of day to depart. momondo users have found prices as low as $208 when looking at flights departing in the evening. Flights at noon are often more expensive with an average ticket price of $491.

Fly from San Antonio to Baltimore/Washington for the best San Antonio - Baltimore/Washington flight prices

You are more likely to see cheaper flights to Baltimore from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Baltimore for around $471 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Baltimore from San Antonio for as low as $290 on momondo.

There is only 1 cabin class available to choose from on San Antonio to Baltimore flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest is the most popular carrier operating from San Antonio to Baltimore/Washington

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to Baltimore from San Antonio according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Baltimore. Keep in mind that there are 7 different airlines that fly to Baltimore on a routine basis, so you have a few additional options to choose from.

Dallas (DFW) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Atlanta (ATL) offer the lowest average round-trip price of $389.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 5h 25m.

Dallas (DFW) has the shortest average layover time for this route: 1h 16m.

As of July 2026, there are 2 flights per day flying from San Antonio to Baltimore. The most common time of day flights depart is 3:00PM, with 42% of flights taking off in the afternoon.

19 flights are operational weekly from San Antonio to Baltimore as of July 2026. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.