Cheap flights from San Antonio to District of Columbia from $115

In general, February is the cheapest month to fly from San Antonio to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $337. If you don’t want to visit District of Columbia in February, then you should wait until April to fly from San Antonio, when ticket prices are also cheap, with an average price of $366.

The cheapest day to depart on your flight to District of Columbia is on a Thursday when prices can be found for as low as $404. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from San Antonio because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $725.

Flying to District of Columbia from San Antonio in the morning is the least expensive time of day to depart. momondo users have found prices as low as $498 when looking at flights departing in the morning. Flights to District of Columbia are more costly in the afternoon, with an average ticket price of $874. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to District of Columbia from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $384 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from San Antonio for as low as $249 on momondo.

There are 4 cabin classes available to choose from on San Antonio to District of Columbia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, Southwest, and Delta are the most popular carriers operating from San Antonio to District of Columbia

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to District of Columbia 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 District of Columbia. Keep in mind that there are 7 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

9 flights are operational daily from San Antonio to District of Columbia as of September 2026. The most popular departure time for this route is 7:00AM, with 66% of flights per day taking off at noon.

The number of flights available between San Antonio and District of Columbia is 63 per week as of September 2026. The most frequent departure day is Tue, with 17% of weekly flights leaving on this day.