How far is Shamrock, TX from San Antonio, TX?
The driving distance from Shamrock, TX to San Antonio, TX is about 455.1 miles (732.4 km), with a travel time of about 07h 25m by car.
- The straight-line flight distance is about 413 miles (664.6 km).
- For a round trip, plan for roughly 14h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 07h 25m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Human settlement in Taylor County, Texas, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny 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 Shamrock and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Shamrock and San Antonio.
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1
Start on East Railroad Avenue
14 m · 8 sec · East Railroad Avenue
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2
Turn left onto South Main Street
145.2 mi · 3 hr 5 min · South Main Street
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3
Turn right
30 m · 3 sec
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4
Turn left
39.2 mi · 58 min
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5
Continue on West Court Plaza
595 ft · 8 sec · West Court Plaza
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6
Turn slight right onto Commercial Avenue
32.5 mi · 35 min · Commercial Avenue
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7
Continue straight
7.8 mi · 9 min
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8
Continue straight
39.5 mi · 45 min
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9
Turn left onto South 7th Street
16.5 mi · 18 min · South 7th Street
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10
Continue on Grassmeyer Street
41.9 mi · 45 min · Grassmeyer Street
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11
Continue on Ellis Street
29.4 mi · 31 min · Ellis Street
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12
Take the exit left toward I 10 East: San Antonio
40 mi · 38 min
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13
Continue straight
54.3 mi · 55 min
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14
Keep slight right
17.4 mi · 20 min
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15
Keep slight right to continue on McDermott Freeway
1.7 mi · 2 min · McDermott Freeway
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16
Take the exit slight right toward Santa Rosa Street, Downtown
2505 ft · 1 min
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17
Turn straight onto North Pecos-La Trinidad
804 ft · 16 sec · North Pecos-La Trinidad
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18
Keep slight right to continue on North Pecos-La Trinidad
2963 ft · 1 min · North Pecos-La Trinidad
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19
Turn left onto Dolorosa Street
2582 ft · 56 sec · Dolorosa Street
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20
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Shamrock and San Antonio.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
South Main Street
Turn left onto South Main Street
145 mi · 03h 05m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny then Slight Chance Showers And Thunderstorms leaving Shamrock 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 Shamrock to San Antonio?
The road trip is about 455.1 miles (732.4 km) and usually takes 07h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Tuscola is a useful midpoint, sitting about 233.9 miles from Shamrock and 221.1 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 413 miles (664.6 km), while the road route adds roughly 42.1 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 6:00 AM to 7:30 AM CDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $60.69 one way or $121.38 round trip. Estimated CO2 is about 142.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Showers And Thunderstorms around Shamrock and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
Flight Path Map
This map shows the direct air route between Shamrock and San Antonio. Straight-line distance: 412.96 mi (664.59 km).
#1 Shamrock
City in Texas
| Population | 1,989 |
| Coordinates | 35.2142200, -100.2490100 |
| Altitude | 714 |
| 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: 732 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 15h 09m |
| 40 mph (64.37 km/h) | 11h 22m |
| 50 mph (80.47 km/h) | 09h 06m |
| 60 mph (96.56 km/h) | 07h 35m |
| 70 mph (112.65 km/h) | 06h 30m |
| 80 mph (129 km/h) | 05h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $60.69 | $121.38 |
| Mid-grade | $4.25 | $68.29 | $136.57 |
| Premium | $4.59 | $73.73 | $147.46 |
| Diesel | $3.99 | $64.13 | $128.26 |
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 · 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.