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Find low faresSouthwest® flights from Washington, D.C. (Dulles) to San Antonio from $135
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1 Passenger
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Low fares from Washington, D.C. (Dulles) to San Antonio
$
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 03/07/2026
One-way
Choice
From
$135
Seen: 15 hrs ago
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 03/01/2026
One-way
Choice
From
$135
Seen: 4 hrs ago
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 02/25/2026
One-way
Choice
From
$135
Seen: 9 hrs ago
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 03/09/2026
One-way
Choice
From
$135
Seen: 15 hrs ago
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 04/16/2026
One-way
Choice
From
$135
Seen: 1 hour ago
Washington, D.C. (Dulles) (IAD)to
San Antonio (SAT)
Depart: 05/01/2026
One-way
Basic
From
$165
Seen: 1 hour ago
Explore flights from Washington, D.C. (Dulles) to San Antonio
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Flight Details
Departing from:
Dulles International Airport
Arriving at:
San Antonio International Airport
Distance:
1362 miles
Route Information
15† Weekly flights
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
There are 15 weekly flights from Washington, D.C. (Dulles) to San Antonio on Southwest Airlines.
To find the lowest fares by day and time to fly Washington, D.C. (Dulles) to San Antonio with Southwest, check out our Low Fare Calendar.
You can rent a car at San Antonio International Airport book yours with your flight.
Yes! Flights from Washington, D.C. (Dulles) to San Antonio—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.