How far is San Antonio, TX from Blanco, TX?
The driving distance from San Antonio, TX to Blanco, TX is about 49.9 miles (80.3 km), with a travel time of about 01h 00m by car.
- The straight-line flight distance is about 46.8 miles (75.3 km).
- For a round trip, plan for roughly 02h 00m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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 00m.
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.
City in Comal 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 San Antonio and Blanco.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio and Blanco.
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1
Start on Dolorosa Street
44 m · 5 sec · Dolorosa Street
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2
Continue on West Market Street
1893 ft · 42 sec · West Market Street
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3
Continue on East Market Street
2143 ft · 46 sec · East Market Street
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4
Turn left
111 m · 13 sec
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5
Turn straight onto East Commerce Street
66 m · 13 sec · East Commerce Street
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6
Take the ramp sharp left toward US 281 North, I 37 North
1159 ft · 28 sec
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7
Merge slight left onto William J Bordelon Freeway
1.5 km · 1 min · William J Bordelon Freeway
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8
Continue on McAllister Freeway
14.9 mi · 18 min · McAllister Freeway
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9
Keep slight left to continue on US 281 HOV Lane
2.9 mi · 3 min · US 281 HOV Lane
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10
Merge slight right
30 mi · 36 min
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11
Turn right onto 4th Street
69 m · 5 sec · 4th Street
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12
Arrive at your destination
0 m · 1 sec · 4th Street
Car Route Details
A richer read on the saved driving route between San Antonio and Blanco.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US 281 HOV Lane
Merge slight right
30 mi · 00h 36m
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.
Mostly Cloudy leaving San Antonio and Mostly Cloudy near Blanco.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Antonio to Blanco?
The road trip is about 49.9 miles (80.3 km) and usually takes 01h 00m 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?
Bulverde is a useful midpoint, sitting about 25 miles from San Antonio and 24.9 miles from Blanco.
How much longer is the road route than the straight-line distance?
The direct path is about 46.8 miles (75.3 km), while the road route adds roughly 3.1 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 4:30 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.65 one way or $13.30 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around San Antonio and Mostly Cloudy near Blanco.
Stop Ideas Near Bulverde
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Cohen for San Antonio City Council
Bulverde City Hall (Rathaus)
City of Shavano Park - Municipal Court
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Bulverde.
San Antonio Station
San Marcos Station
Austin
Flight Path Map
This map shows the direct air route between San Antonio and Blanco. Straight-line distance: 46.76 mi (75.25 km).
#1 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 |
#2 Blanco
City in Blanco County, Texas, United States
| Population | 2,156 |
| Coordinates | 30.0979900, -98.4214100 |
| Altitude | 405 |
| Country | United States |
End: Blanco (-98.42141, 30.09799)
Estimated Travel Time
Distance: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 39m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $6.65 | $13.30 |
| Mid-grade | $4.25 | $7.48 | $14.97 |
| Premium | $4.59 | $8.08 | $16.16 |
| Diesel | $3.99 | $7.03 | $14.06 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.