Route guide
Cheap Flights from Washington, DC to San Antonio: Book Airline Tickets
- Distance
- about 1,360 mi
- Typical flight time
- 3 h – 4 h
- Airports
- 3 × 1
- Time difference
- 1 h behind
This page covers the practical side of flying between Washington, DC and San Antonio: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Washington, DC to San Antonio is about 1,360 miles (2,190 km) and a typical flight takes 3 h to 4 h. San Antonio is 1 hour behind Washington, DC. Washington, DC has 3 airports to compare and San Antonio has 1.
Airport pairs to compare
The Washington area has three airports. Reagan National is closest to the city, Dulles handles more long-haul traffic, and BWI sits between Washington and Baltimore. San Antonio's airport is north of downtown and straightforward to use.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| DCA to SAT | Ronald Reagan Washington National | San Antonio International |
| IAD to SAT | Washington Dulles International | San Antonio International |
| BWI to SAT | Baltimore/Washington International | San Antonio International |
About the airports
- DCA · Ronald Reagan Washington National
Closest to downtown and served by Metrorail. - IAD · Washington Dulles International
Farther out in Virginia, with the larger share of long-haul flights and a Metrorail Silver Line station. - BWI · Baltimore/Washington International
Between Baltimore and Washington, often competitive on price. - SAT · San Antonio International
The main airport, north of downtown.
Airlines with a major base at either end
- At Washington, DC: United Airlines, American Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Washington, DC
Spring is popular for cherry blossoms in late March and early April. Fall is pleasant, and summer is hot and humid.
San Antonio
Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild.
How long is Washington, DC to San Antonio?
At about 1,360 miles, Washington, DC to San Antonio is a short-to-medium flight. Fares on routes this length are sensitive to the day of the week and the time of day, so check a few departure times before you settle.
Time zones and timing
San Antonio is 1 hour behind Washington, DC, so you land at a local time 1 hour earlier than departure time plus flight time would suggest. Plan your arrival day around local time at the destination.
Getting between the airport and town
Washington, DC: Metrorail serves Reagan National directly and Dulles through the Silver Line, which avoids a lot of traffic.
San Antonio: Rental cars, taxis and ride-hail are the most common ways into the city. City buses also serve the airport.
Planning ground transport too? See our car rental guide.
Good to know
- Check every airport pairing when you compare fares. Schedules and airline options can differ between them.
- Reagan National has a perimeter rule that limits most nonstop flights to a certain distance, so longer routes often use Dulles or BWI.
- Thunderstorms in spring and summer can cause delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying San Antonio to Washington, DC?
This route guide works in both directions. For other trips, see all flights from Washington, DC or all flights from San Antonio.
Frequently asked questions
How far is Washington, DC from San Antonio?
The straight-line distance between the main airports is about 1,360 miles (2,190 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Washington, DC to San Antonio?
A typical scheduled flight takes roughly 3 h to 4 h in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Washington, DC: DCA (Ronald Reagan Washington National), IAD (Washington Dulles International), BWI (Baltimore/Washington International). At San Antonio: SAT (San Antonio International). Ask for prices on more than one pairing.
Is there a time difference?
San Antonio is 1 hour behind Washington, DC.
When is the best time to fly from Washington, DC to San Antonio?
In Washington, DC: Spring is popular for cherry blossoms in late March and early April. Fall is pleasant, and summer is hot and humid. In San Antonio: Spring and fall are the most comfortable seasons. Summers are hot, and winters are mild. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Washington, DC to San Antonio?
Airlines with a major base at either end include United Airlines and American Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.