How far is San Antonio, TX from Tornillo, TX?
The driving distance from San Antonio, TX to Tornillo, TX is about 518.5 miles (834.5 km), with a travel time of about 08h 20m by car.
- The straight-line flight distance is about 473.4 miles (761.8 km).
- For a round trip, plan for roughly 16h 41m 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 08h 20m.
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.
City in Pecos County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Partly Sunny
Driving Route Map
The map below follows the saved road route between San Antonio and Tornillo.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio and Tornillo.
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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
1042 ft · 28 sec · West Market Street
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3
Turn left onto Navarro Street
1.3 km · 2 min · Navarro Street
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4
Enter the roundabout and take exit 2 toward San Pedro Avenue
26 m · 2 sec · San Pedro Avenue
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5
Exit the roundabout onto San Pedro Avenue
2891 ft · 1 min · San Pedro Avenue
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6
Turn left onto West Cypress Street
604 ft · 10 sec · West Cypress Street
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7
Turn straight onto East Fredericksburg Road
1.2 mi · 2 min · East Fredericksburg Road
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8
Turn right onto Interstate 10 West
657 ft · 13 sec · Interstate 10 West
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9
Take the ramp slight left toward I 10 West, US 87 North
553 ft · 14 sec
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10
Merge slight left onto McDermott Freeway
12.8 mi · 15 min · McDermott Freeway
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11
Keep slight right
499.5 mi · 7 hr 53 min
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12
Take the exit slight right toward Tornillo
1171 ft · 35 sec
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13
Turn left onto O T Smith Road
1.6 km · 1 min · O T Smith Road
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14
Continue on O T Smith Road
1.8 mi · 4 min · O T Smith Road
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15
Turn left onto Alameda Avenue
24 m · 1 sec · Alameda Avenue
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16
Arrive at your destination
0 m · 1 sec · Alameda Avenue
Car Route Details
A richer read on the saved driving route between San Antonio and Tornillo.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
McDermott Freeway
Keep slight right
499 mi · 07h 53m
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 Cloudy leaving San Antonio and Partly Sunny near Tornillo.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Antonio to Tornillo?
The road trip is about 518.5 miles (834.5 km) and usually takes 08h 20m 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?
Iraan is a useful midpoint, sitting about 259 miles from San Antonio and 259.5 miles from Tornillo.
How much longer is the road route than the straight-line distance?
The direct path is about 473.4 miles (761.8 km), while the road route adds roughly 45.1 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 $69.16 one way or $138.31 round trip. Estimated CO2 is about 162.6 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between San Antonio and Tornillo, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around San Antonio and Partly Sunny near Tornillo.
Stop Ideas Near Iraan
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 Iraan.
Sanderson
Flight Path Map
This map shows the direct air route between San Antonio and Tornillo. Straight-line distance: 473.37 mi (761.82 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 Tornillo
Census designated place
| Population | 1,568 |
| Coordinates | 31.4454000, -106.0883100 |
| Altitude | 1093 |
| Country | United States |
End: Tornillo (-106.08831, 31.4454)
Estimated Travel Time
Distance: 834 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 17h 16m |
| 40 mph (64.37 km/h) | 12h 57m |
| 50 mph (80.47 km/h) | 10h 22m |
| 60 mph (96.56 km/h) | 08h 38m |
| 70 mph (112.65 km/h) | 07h 24m |
| 80 mph (129 km/h) | 06h 28m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $69.16 | $138.31 |
| Mid-grade | $4.25 | $77.81 | $155.62 |
| Premium | $4.59 | $84.02 | $168.03 |
| Diesel | $3.99 | $73.07 | $146.14 |
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.