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Best Route from Houston to San Antonio: An I-10 Guide
Find the best route from Houston to San Antonio, with drive times, distances, and worthwhile stops along I-10 West.
In short
The fastest route from Houston to San Antonio runs along I-10 West, covering about 328 km (204 mi) in roughly 3 hours 10 minutes of driving without stops. A route that avoids some highways exists, but at about 387 km (241 mi) and roughly 5 hours 10 minutes, it's around 62% longer and not a practical alternative. Most drivers stick to I-10, which also happens to pass the one stop along the way worth building time around.
Whether you’re heading out for a Tex-Mex weekend or folding this drive into a longer Texas loop, the best route from Houston to San Antonio comes down to a single highway with a handful of good reasons to pull off it. Houston, Texas and San Antonio sit about three and a half hours apart by interstate, close enough for a day trip and relaxed enough to stretch into a two- or three-day getaway. Here’s the route leg by leg, where it’s worth stopping, and what waits at each end.
The drive, leg by leg
| Leg | Distance | Drive time |
|---|---|---|
| Houston to Katy | 30 mi / 48 km | 30 min |
| Katy to Columbus | 45 mi / 72 km | 40 min |
| Columbus to Schulenburg | 24 mi / 39 km | 20 min |
| Schulenburg to Seguin | 68 mi / 109 km | 1 h |
| Seguin to San Antonio | 38 mi / 62 km | 40 min |
| Total | 205 mi / 330 km | 3 h 10 min |
Drive times without stops or traffic, to the nearest 5 minutes. Routing by Geoapify · map data © OpenStreetMap contributors.
The fastest route from Houston to San Antonio
Driving I-10 West, leg by leg
The whole drive follows I-10 West, and it breaks down into five manageable legs:
- Houston to Katy: about 48 km / 30 mi, roughly 30 minutes
- Katy to Columbus: about 72 km / 45 mi, roughly 40 minutes
- Columbus to Schulenburg: about 39 km / 24 mi, roughly 20 minutes
- Schulenburg to Seguin: about 109 km / 68 mi, roughly 1 hour
- Seguin to San Antonio: about 62 km / 38 mi, roughly 40 minutes
Add it up and you get about 328 km (204 mi) and 3 hours 10 minutes of driving without stops. It’s a straightforward interstate run with no tricky interchanges, which is part of why it’s the go-to route for this trip.
The alternative with fewer highways
There’s a way to make this drive using fewer highways, but it runs about 387 km (241 mi) and takes roughly 5 hours 10 minutes — about 62% longer than I-10. Unless you have a specific reason to avoid the interstate, it’s not a practical alternative, and we wouldn’t recommend planning around it.
Good stops along the way
I-10 West passes through a few small towns that make natural breaks, whether you need gas and coffee or want to turn the drive into more of a road trip.
Katy and Columbus
Katy, just west of Houston, and Columbus, roughly an hour farther along, are both easy, practical places to stretch your legs early in the drive before the longer stretch to Schulenburg.
Schulenburg, Texas
Schulenburg is the most distinct stop on this route. This small town carries a strong German cultural heritage, with the Texas Polka Music Museum and other local exhibits reflecting its roots. It’s a quiet, walkable place with small-town charm — a good spot to break up the drive with a short walk through its historic streets before continuing on.
Seguin
Seguin is the last stop before San Antonio, about 40 minutes from the city. It’s a convenient place to top off gas or grab a meal before the final leg in.
For a closer look at what’s worth adding to your itinerary along this stretch, see Things to See Between Houston and San Antonio.
Houston and San Antonio: trip bookends
Houston, Texas
Houston punches above its weight as a culinary capital, with one of the most ethnically diverse restaurant scenes in the country — Vietnamese banh mi, Tex-Mex, and Nigerian suya all within reach. Beyond the food, NASA’s Space Center, the museums of the Museum District, and a network of bayou trails give travelers plenty of reasons to spend a couple of days here before hitting the road. If you’re continuing on from Houston in a different direction, our Houston to NOLA Drive: Route, Distance & Best Stops guide covers that route too.
San Antonio
San Antonio is home to the Alamo and a string of Spanish colonial missions, layering centuries of Tejano, Mexican, and American history along the scenic River Walk. It’s a vibrant, walkable city with a lively arts scene, strong Tex-Mex food, and family-friendly attractions like the Natural Bridge Caverns — enough to fill two to four days if you give it the time.
Tip
Journey Builder can search for stops up to 250 km off your route, not just directly on it.
Good to know
Journey Builder's auto-scheduler usually builds a full day-by-day plan in just 1-3 minutes.
Planning the drive without the guesswork
Picking the route is the easy part; figuring out where to stop, how long to stay, and what to do once you arrive is where road trips usually get complicated. That’s the gap Journey Builder fills. It builds the Houston-to-San Antonio route automatically, with distance and drive time for every leg, and ranks towns along the way so you can see whether a stop like Schulenburg sits right on your route or requires a detour. From there, its auto-scheduler turns your picks — stops, meals, places to stay — into a day-by-day plan built around your wake-up and bedtime, drive times, and any fixed reservations. For the full walkthrough, see How to Plan a Road Trip from Houston to San Antonio.
Journey Builder isn’t limited to Texas, either — it plans road trips in 14 countries, from quick weekend runs to 90-day journeys, the same way it would handle a drive like the The Las Vegas to San Diego Drive: Routes, Time, and Best Stops. If that kind of logistics support sounds useful, you can Be among the first to plan with Journey Builder.
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Sign up for Journey BuilderIn this series
- Things to See Between Houston and San Antonio
- Best Route from Houston to San Antonio: An I-10 Guide
- How to Plan a Road Trip from Houston to San Antonio
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