Cheap flights from San Antonio to Washington, D.C. from $145

In general, April is the cheapest month to fly from San Antonio to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $326. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of April, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $359.

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $447. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Washington, D.C. Dulles Intl Airport for around $787.

Flying to Washington, D.C. Dulles Intl Airport from San Antonio in the morning is the least expensive time of day to depart. momondo users have found prices as low as $583 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $708 on average. Flights to Washington, D.C. Dulles Intl Airport from San Antonio in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $384 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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 3% on your flight if you consider stops on a San Antonio to Washington, D.C. Dulles Intl Airport flight.

As of August 2026, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 19% more expensive when compared to flights at the same time last year.

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

United Airlines, Allegiant Air and Frontier are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from San Antonio according to our data. United Airlines is the first choice among our users, with 84% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 5 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 3 flights per day flying from San Antonio to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 12:00PM, with 55% of flights taking off in the afternoon.

As of August 2026, 25 flights take off from San Antonio and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Fri, with 32% of weekly flights taking off on this day.