How far is Austin, TX from San Antonio, TX?
Fastest route
The distance between Austin, Texas, and San Antonio, Texas is approximately 79.1 miles (127.4 kilometers). The fastest route is via I-35 S, with an estimated travel time of 1 hour and 13 minutes. Here are the directions for the journey:
Directions
- Head south on Congress Ave. toward W 5th St.
- Pass by the lake on the right in 0.3 miles.
- Use the left 2 lanes to turn left onto E Riverside Dr.
- Slight right onto S I-35 Frontage Rd.
- Use the left lane to take the Interstate 35 ramp.
- Follow I-35 S to E Commerce St in San Antonio.
- Take exit 141A from I-37 S/US-281 S.
Tips & Suggestions
- 🚗 Tip: Plan your journey during off-peak traffic hours to avoid delays.
- 🛣️ Suggestion: Use GPS navigation to stay on track and receive real-time traffic updates.
- ⛽ Suggestion: Refuel your vehicle before starting the trip to ensure you have enough gas for the journey.
- 🍴 Suggestion: Consider stopping for a meal or snacks along the way to keep yourself energized.
- 🚧 Tip: Stay updated on road closures or construction work that might affect your route.
FAQs
Q: How long is the distance between Austin and San Antonio? A: The distance between Austin, Texas, and San Antonio, Texas is approximately 79.1 miles (127.4 kilometers).
Q: What is the estimated travel time for this route? A: The fastest route via I-35 S has an estimated travel time of 1 hour and 13 minutes.
Q: Are there any suggestions for the journey? A: Yes, consider planning your journey during off-peak traffic hours, using GPS navigation, refueling your vehicle, stopping for meals, and staying updated on road closures.
Q: What landmarks should I look for while on the route? A: You'll pass by a lake on the right in 0.3 miles as you head south on Congress Ave. in Austin.
Q: How do I reach San Antonio from Austin using the I-35 S route? A: To reach San Antonio from Austin, take I-35 S, follow the directions provided, and take exit 141A from I-37 S/US-281 S in San Antonio.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 20m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Census-designated place in Texas
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Austin and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Austin and San Antonio.
-
1
Start on East 5th Street
2551 ft · 1 min · East 5th Street
-
2
At the end of the road, turn right onto North Interstate 35
1893 ft · 40 sec · North Interstate 35
-
3
Take the ramp slight left toward I 35 South
899 ft · 22 sec
-
4
Merge slight left onto Purple Heart Trail
46.4 mi · 50 min · Purple Heart Trail
-
5
Continue on Interstate Highway 35
1.7 mi · 2 min · Interstate Highway 35
-
6
Continue on Purple Heart Trail
11.9 mi · 13 min · Purple Heart Trail
-
7
Continue on North Pan Am Expressway
10 mi · 12 min · North Pan Am Expressway
-
8
Keep slight left to continue on North Pan Am Expressway
6.4 mi · 8 min · North Pan Am Expressway
-
9
Keep slight left to continue on North Pan Am Expressway
2907 ft · 41 sec · North Pan Am Expressway
-
10
Take the exit slight right toward Lexington Avenue, Main Avenue, San Pedro Avenue
684 ft · 17 sec
-
11
Turn straight onto East Elmira Street
526 ft · 17 sec · East Elmira Street
-
12
Turn left onto North Main Avenue
830 ft · 19 sec · North Main Avenue
-
13
Enter the roundabout and take exit 2 toward Navarro Street
49 m · 3 sec · Navarro Street
-
14
Exit the roundabout onto Navarro Street
34 m · 2 sec · Navarro Street
-
15
Keep slight right to continue on North Main Avenue
2181 ft · 52 sec · North Main Avenue
-
16
Turn right onto West Travis Street
68 m · 11 sec · West Travis Street
-
17
Turn left onto North Flores Street
807 ft · 20 sec · North Flores Street
-
18
Continue on Military Plaza
119 m · 16 sec · Military Plaza
-
19
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
-
20
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Austin and San Antonio.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Purple Heart Trail
Merge slight left onto Purple Heart Trail
46.4 mi · 00h 50m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Chance Showers And Thunderstorms leaving Austin and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Austin to San Antonio?
The road trip is about 79.9 miles (128.6 km) and usually takes 01h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Lake Dunlap is a useful midpoint, sitting about 39.6 miles from Austin and 40.3 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 73.6 miles (118.4 km), while the road route adds roughly 6.3 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 3:50 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.66 one way or $21.31 round trip. Estimated CO2 is about 25.1 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Austin and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
Stop Ideas Near Lake Dunlap
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
New Braunfels Parks and Recreation
New Braunfels City Hall
Comal County Courthouse(Gerichtsgebäude)
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Lake Dunlap.
San Marcos Station
San Antonio Station
Austin
Taylor
Flight Path Map
This map shows the direct air route between Austin and San Antonio. Straight-line distance: 73.6 mi (118.44 km).
#1 Austin
The eleventh most populous city in the United States and the center of the Austin metropolitan area.
| Population | 995,484 |
| Coordinates | 30.2671500, -97.7430600 |
| Altitude | 149 |
| Country | United States |
#2 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 129 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 39m |
| 40 mph (64.37 km/h) | 01h 59m |
| 50 mph (80.47 km/h) | 01h 35m |
| 60 mph (96.56 km/h) | 01h 19m |
| 70 mph (112.65 km/h) | 01h 08m |
| 80 mph (129 km/h) | 00h 59m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $10.66 | $21.31 |
| Mid-grade | $4.25 | $11.99 | $23.98 |
| Premium | $4.59 | $12.95 | $25.89 |
| Diesel | $3.99 | $11.26 | $22.52 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Texas · Apr 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.