How far is South Houston, TX from San Antonio, TX?
The driving distance from South Houston, TX to San Antonio, TX is about 208.9 miles (336.2 km), with a travel time of about 03h 22m by car.
- The straight-line flight distance is about 196.5 miles (316.3 km).
- For a round trip, plan for roughly 06h 44m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 22m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
City in Fayette County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between South Houston and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between South Houston and San Antonio.
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1
Start on Galveston Road
1 km · 1 min · Galveston Road
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2
Turn left onto Winkler Drive
1.1 mi · 2 min · Winkler Drive
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3
Continue on Monroe Road
148 m · 8 sec · Monroe Road
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4
Turn right onto Gulf Freeway Frontage Road
933 ft · 20 sec · Gulf Freeway Frontage Road
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5
Take the ramp slight left toward I 45 North
881 ft · 21 sec
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6
Merge slight left onto Gulf Freeway
10.2 mi · 12 min · Gulf Freeway
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7
Take the exit slight left toward I 10 West: San Antonio
717 ft · 18 sec
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8
Merge slight left onto Katy Freeway
174.7 mi · 3 hr 2 min · Katy Freeway
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9
Keep slight left
12 mi · 13 min
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10
Keep slight left to continue on 90th Infantry Division Highway
1.2 km · 52 sec · 90th Infantry Division Highway
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11
Continue on Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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12
Take the exit slight right toward Commerce Street, Houston Street
790 ft · 19 sec
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13
Turn straight onto Interstate 10 East
1830 ft · 39 sec · Interstate 10 East
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14
Turn right onto East Houston Street
963 ft · 20 sec · East Houston Street
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15
Turn slight left onto East Commerce Street
4.3 mi · 7 min · East Commerce Street
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16
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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17
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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18
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between South Houston and San Antonio.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Katy Freeway
Merge slight left onto Katy Freeway
175 mi · 03h 02m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Cloudy then Chance Showers And Thunderstorms leaving South Houston and 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 South Houston to San Antonio?
The road trip is about 208.9 miles (336.2 km) and usually takes 03h 22m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Schulenburg is a useful midpoint, sitting about 103.2 miles from South Houston and 105.7 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 196.5 miles (316.3 km), while the road route adds roughly 12.4 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:16 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.85 one way or $55.70 round trip. Estimated CO2 is about 65.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Chance Showers And Thunderstorms around South Houston and Chance Showers And Thunderstorms near San Antonio.
Stop Ideas Near Schulenburg
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Schulenburg.
Prairie View, TX
San Marcos Station
Austin
Taylor
Flight Path Map
This map shows the direct air route between South Houston and San Antonio. Straight-line distance: 196.53 mi (316.29 km).
#1 South Houston
City in Harris County, Texas, United States
| Population | 17,446 |
| Coordinates | 29.6630100, -95.2354900 |
| Altitude | 9 |
| 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: 336 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 57m |
| 40 mph (64.37 km/h) | 05h 13m |
| 50 mph (80.47 km/h) | 04h 10m |
| 60 mph (96.56 km/h) | 03h 28m |
| 70 mph (112.65 km/h) | 02h 59m |
| 80 mph (129 km/h) | 02h 36m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $27.85 | $55.70 |
| Mid-grade | $4.25 | $31.34 | $62.67 |
| Premium | $4.59 | $33.84 | $67.67 |
| Diesel | $3.99 | $29.43 | $58.86 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.