How far is Blanco, TX from San Antonio, TX?
The driving distance from Blanco, TX to San Antonio, TX is about 50.9 miles (81.9 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.
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Blanco and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Blanco and San Antonio.
-
1
Start on 4th Street
69 m · 12 sec · 4th Street
-
2
Turn left onto Main Street
1556 ft · 38 sec · Main Street
-
3
Continue on South US Highway 281
26.6 mi · 32 min · South US Highway 281
-
4
Turn straight
3.1 mi · 3 min
-
5
Keep slight left to continue on US 281 HOV Lane
2.9 mi · 3 min · US 281 HOV Lane
-
6
Merge slight right
14.8 mi · 18 min
-
7
Continue on William J Bordelon Freeway
1.1 mi · 1 min · William J Bordelon Freeway
-
8
Take the exit slight right toward Commerce Street, Downtown
797 ft · 19 sec
-
9
Keep slight right to continue on Downtown, The Alamo, Visitor Information Center
55 m · 4 sec
-
10
Turn slight right onto East Commerce Street
1.3 km · 2 min · East Commerce Street
-
11
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
-
12
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
-
13
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Blanco 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.
South US Highway 281
Continue on South US Highway 281
26.6 mi · 00h 32m
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.
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms leaving Blanco and Chance Showers And Thunderstorms then Slight 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 Blanco to San Antonio?
The road trip is about 50.9 miles (81.9 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 Blanco and 25.8 miles from San Antonio.
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 4.1 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 $6.80 one way or $13.60 round trip. Estimated CO2 is about 16 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms around Blanco and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
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 Blanco and San Antonio. Straight-line distance: 46.76 mi (75.25 km).
#1 Blanco
City in Blanco County, Texas, United States
| Population | 2,156 |
| Coordinates | 30.0979900, -98.4214100 |
| Altitude | 405 |
| 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: 82 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 41m |
| 40 mph (64.37 km/h) | 01h 16m |
| 50 mph (80.47 km/h) | 01h 01m |
| 60 mph (96.56 km/h) | 00h 50m |
| 70 mph (112.65 km/h) | 00h 43m |
| 80 mph (129 km/h) | 00h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $6.80 | $13.60 |
| Mid-grade | $4.25 | $7.65 | $15.31 |
| Premium | $4.59 | $8.26 | $16.53 |
| Diesel | $3.99 | $7.19 | $14.37 |
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.