How far is Sweeny, TX from San Antonio, TX?
The driving distance from Sweeny, TX to San Antonio, TX is about 203.3 miles (327.1 km), with a travel time of about 03h 38m by car.
- The straight-line flight distance is about 170.6 miles (274.6 km).
- For a round trip, plan for roughly 07h 16m 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 38m.
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
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Sweeny and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sweeny and San Antonio.
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1
Start on North Main Street
24 m · 4 sec · North Main Street
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2
Turn right onto East 2nd Street
1.3 km · 1 min · East 2nd Street
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3
Continue on North McKinney Street
1588 ft · 32 sec · North McKinney Street
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4
Continue on East 7th Street
3.4 mi · 6 min · East 7th Street
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5
Turn right
4.6 mi · 7 min
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6
Turn sharp left onto North Columbia Drive
20.5 mi · 31 min · North Columbia Drive
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7
Turn left onto Main Street
8.9 mi · 16 min · Main Street
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8
At the end of the road, turn right
1 km · 1 min
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9
Turn left
4.6 mi · 8 min
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10
At the end of the road, turn left onto US Highway 90A West
5 mi · 7 min · US Highway 90A West
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11
Continue on Main Street
1.4 mi · 2 min · Main Street
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12
Continue on US Highway 90A
9.1 mi · 13 min · US Highway 90A
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13
Continue on Main Street
1.3 km · 1 min · Main Street
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14
Continue on US Highway 90A
5.4 mi · 6 min · US Highway 90A
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15
Continue on East Main Street
1.3 km · 2 min · East Main Street
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16
Turn slight left onto Boothe Drive
1844 ft · 52 sec · Boothe Drive
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17
Continue on South McCarty Avenue
1.3 km · 2 min · South McCarty Avenue
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18
Continue on US Highway 90A
7.4 mi · 8 min · US Highway 90A
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19
Turn right onto State Highway 71
9.8 mi · 10 min · State Highway 71
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20
Turn left onto I-10 Service Road
136 m · 9 sec · I-10 Service Road
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21
Take the ramp straight
1330 ft · 32 sec
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22
Merge slight left
92.8 mi · 1 hr 33 min
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23
Continue straight
9.4 mi · 9 min
-
24
Keep slight left
12 mi · 13 min
-
25
Keep slight left to continue on 90th Infantry Division Highway
1.2 km · 52 sec · 90th Infantry Division Highway
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26
Continue on Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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27
Take the exit slight right toward Commerce Street, Houston Street
790 ft · 19 sec
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28
Turn straight onto Interstate 10 East
1830 ft · 39 sec · Interstate 10 East
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29
Turn right onto East Houston Street
963 ft · 20 sec · East Houston Street
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30
Turn slight left onto East Commerce Street
4.3 mi · 7 min · East Commerce Street
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31
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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32
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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33
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Sweeny 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.
I-10 Service Road
Merge slight left
92.8 mi · 01h 33m
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 leaving Sweeny and Mostly Cloudy near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sweeny to San Antonio?
The road trip is about 203.3 miles (327.1 km) and usually takes 03h 38m 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 Sweeny and 100 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 170.6 miles (274.6 km), while the road route adds roughly 32.7 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 9:44 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.10 one way or $54.19 round trip. Estimated CO2 is about 63.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Sweeny and Mostly Cloudy 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 Sweeny and San Antonio. Straight-line distance: 170.61 mi (274.57 km).
#1 Sweeny
City in Brazoria County, Texas, United States
| Population | 3,618 |
| Coordinates | 29.0388600, -95.6985600 |
| 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: 327 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 46m |
| 40 mph (64.37 km/h) | 05h 04m |
| 50 mph (80.47 km/h) | 04h 03m |
| 60 mph (96.56 km/h) | 03h 23m |
| 70 mph (112.65 km/h) | 02h 54m |
| 80 mph (129 km/h) | 02h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $27.10 | $54.19 |
| Mid-grade | $4.25 | $30.49 | $60.97 |
| Premium | $4.59 | $32.92 | $65.83 |
| Diesel | $3.99 | $28.63 | $57.26 |
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 · May 05, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.