Texas Airport Shuttle

Austin to San Antonio drive miles

The drive from Austin to San Antonio is 79 road miles between the two downtowns — about 1 hr 30 min via I-35 S in normal traffic. If you have ever seen a smaller number quoted, that is the straight-line separation between the cities (about 74 miles); on the ground the highway adds curves, interchanges, and metro frontage that push the odometer to 79. Door-to-door from a specific address typically lands within 5–10 miles of that downtown figure.

Mile by mile on I-35 S

The corridor stacks up cleanly from north to south: 31 miles to San Marcos, 49 miles to New Braunfels, 60 miles to Seguin, and 79 miles to downtown San Antonio. Speed limits are 70–75 mph for most of the run, but the two metros and the New Braunfels–San Marcos gap are where the clock slips — traffic and construction there routinely cost 10–15 minutes on top of the raw distance math.

Drive-miles snapshot

Downtown to downtown: 79 road miles, 1 hours 30 minutes in normal traffic. Add 30–45 minutes for Austin or San Antonio rush hours and event weekends.

Drive miles and times from area towns to San Antonio

All figures below from the same live road-network routing (distances are road miles, times are typical driving minutes in normal traffic):

Shuttle between Austin and San Antonio

Texas Shuttle runs private, door-to-door shuttle service on this corridor 24/7 — pickup at any address in Austin, drop-off at any address in San Antonio, flat vehicle pricing with no surge at any hour. For current corridor fares from real completed trips, see our How far is San Antonio from Austin? page or book a direct Austin to San Antonio shuttle ride.

Group travel on this corridor

Shuttle vans seat up to 8 with luggage, so a family or group traveling together pays one flat vehicle price, not per head — often beating per-person rideshare pricing on a corridor this long.

Austin to San Antonio miles: FAQ

More corridor detail: the reverse-direction answer on our How far is Austin from San Antonio? page, the southbound quick-answer on our How far is San Antonio from Austin? page, and full scheduling through our Austin shuttle and San Antonio shuttle city pages.

Driving yourself vs. booking a shuttle

Covering the 79-mile corridor yourself costs about 1 hours 30 minutes behind the wheel each way, plus parking or garage fees at the far end and the same drive home. A reserved shuttle keeps the driver on one direction only and prices as a flat door-to-door total for the whole vehicle — for two or more travelers the math tightens fast, and nobody has to watch I-35 traffic.

FAQ

How many miles is the drive from Austin to San Antonio?

About 79 road miles between the two downtowns via I-35 S. Door-to-door from a specific address typically adds 5-10 miles on either end.

How many miles from San Marcos and New Braunfels to San Antonio?

San Marcos is about 49 miles from downtown San Antonio, New Braunfels about 32 miles, and Seguin about 35 miles, so most of the corridor mileage stacks up north of New Braunfels.

Is it cheaper to drive or take a shuttle from Austin to San Antonio?

Driving solo covers fuel only, but you pay with 3 hours behind the wheel round trip plus parking at the far end. A flat-rate door-to-door shuttle prices the whole vehicle, so two or more travelers often come out close to even without doing the driving.