Round Rock
Round Rock
San Antonio
San Antonio
Bus Driving

Round Rock to San Antonio

Updated: 28 May 2026

The trip from Round Rock to San Antonio is a quick journey south through the Texas Hill Country. You can drive via I-35 or take a bus service. The distance is approximately 160 kilometers. San Antonio is a historic city famous for the Alamo, the River Walk, and its rich cultural heritage. Expect heavy traffic on I-35, especially near Austin and San Antonio.

Total Distance: Driving distance 160 km, straight-line air distance 140 km.
Fastest Way
Driving takes about 1.5 hours, depending on traffic.
Cheapest Way
Driving is generally the most cost-effective for groups.
Compare Round Rock to San Antonio Routes
Bus
Direct
Driving
Direct
Duration 2 hours 1 hour 30 mins
Avg Price $15 - $30 $15 - $25 (fuel)
Operator Greyhound Personal Vehicle
Route Bus from Austin to San Antonio. I-35 South.
Tip Book tickets online for the best rates. I-35 is the most direct route but can be very busy.
Travel Tips
  • Traffic
    I-35 traffic can be heavy; use navigation apps to avoid delays.
  • Parking
    Parking in downtown San Antonio can be expensive; look for public lots.
  • Public Transit
    VIA Metropolitan Transit offers bus services in San Antonio.
  • Weather
    Texas summers are very hot; stay hydrated and wear light clothing.
  • Booking
    Book bus tickets in advance if you prefer not to drive.
Safety Tips
  • Driving
    Stay alert for aggressive drivers on I-35.
  • Urban Safety
    Stick to well-lit areas in downtown San Antonio at night.
  • Emergency
    Keep a roadside emergency kit in your car.
  • Stay Connected
    Ensure your phone is charged for navigation.
People Also Ask
  • How far is San Antonio from Round Rock?
    It is about 160 kilometers away.
  • Is there a train to San Antonio?
    Yes, the Amtrak Texas Eagle runs from Austin to San Antonio.
  • What is the best way to travel?
    Driving is faster, but the bus is more relaxing.
  • Is San Antonio safe?
    San Antonio is generally safe, but standard urban precautions apply.
  • What is San Antonio known for?
    It is known for the Alamo, the River Walk, and its history.
Quick Info
  • From Round Rock, Texas, United States
  • To San Antonio, Texas, United States
  • Modes
Best Time to Travel

Spring and fall for mild weather.

Things to Do in San Antonio
1
The Alamo
Visit this historic mission and fortress, a symbol of Texas independence.
2
San Antonio River Walk
Stroll along this famous network of walkways along the San Antonio River, lined with shops and restaurants.
3
The Pearl District
Explore this revitalized historic brewery complex featuring restaurants, shops, and a farmers market.
4
San Antonio Missions National Historical Park
Tour the four historic Spanish missions that are part of a UNESCO World Heritage site.
Tags
Round Rock to San Antonio drive bus to San Antonio I-35 travel San Antonio travel guide Texas road trip Round Rock transit best way to San Antonio San Antonio commute Texas travel driving to San Antonio