The cheapest times to fly from IAD to SAT are
- January 1st to February 25th
- April 23rd to May 6th
- July 30th to November 11th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to SAT is mid to late September. Prices can be as high as $563 for Sunday flights during late November to early December, or as low as $244 for Wednesday flights around mid to late September.
When to Fly to San Antonio
Flying from Washington, DC (IAD) to San Antonio, TX (SAT) will usually cost between $289 to $461 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $302. Due to high demand the most expensive time to fly is late November to early December, with an average price of $419. Planning your trip to low-cost times can easily save you $116 on economy flights and even more on first-class flights. Generally, any price below $324 can be considered a good price for a round-trip IAD to SAT flight.
See below for a graph of average weekly prices for the IAD to SAT route. All prices are for round-trip tickets in USD.
Compared to other flights, the IAD to SAT flight is much cheaper than the average and costs much less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.15, which is far below average.
Flight Prices by Day of the Week
Wednesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $109 (26%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $307. Return trip prices are from the SAT to IAD flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from IAD to SAT can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 3 hour 26 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from IAD to SAT? We’ve got answers.
Which airlines fly this route?
You can find 8 major airlines flying this route most often: Alaska, American, Delta, Frontier, Qantas, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.
How far away is it from San Antonio International Airport to Washington Dulles International Airport?
The distance between the two airports is roughly 1360 miles or 2189 kilometers.
How long does it take to fly from IAD to SAT?
The real-world flight time for a nonstop IAD to SAT flight is about 3 hour 26 minutes.
How many flights go between Washington, DC and San Antonio, TX?
It depends on the day of the week and the date, but a typical day might have around 96 available flights from IAD to SAT.
Airport Location Info
|Origination airport name||Washington Dulles International Airport|
|Country||the United States|
|Destination airport name||San Antonio International Airport|
|City||San Antonio, TX|
|Country||the United States|
Late and Early Flight Data
Flights from IAD to SAT tend to depart late far less frequently than the average flight. According to our recently updated data, 18% of flights departed 5 or more minutes late, and 36% of flights left 5 or more minutes early. On average you can expect to leave SAT heading for IAD about 16 minutes late. This does significantly impact arrival time, as the average landing time in San Antonio, TX is about 4 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- United: 28 minutes late
- Mesa: 11 minutes late
- Frontier: 8 minutes early
- Some airlines not reporting
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.