Driving Time from San Antonio to San Marcos
Driving from San Antonio to San Marcos is about 1,334 mi and takes roughly 22 hr 36 min. See the fuel-cost estimate, distance and route tips.
San Antonio and San Marcos are about 1,130 mi (1,819 km) apart in a straight line. By road that works out to roughly 1,334 mi (2,147 km), a drive of about 22 hr 36 min. A nonstop flight covers the great-circle distance in approximately 2 hr 35 min.
| Straight-line distance | 1,130 mi / 1,819 km |
| Road distance (est.) | 1,334 mi / 2,147 km |
| Driving time (est.) | 22 hr 36 min |
| Nonstop flight (est.) | 2 hr 35 min |
| Driving fuel (est., 1-way) | $167 |
| Typical flight fare | $200–$600 |
| Geographic midpoint | 31.624, -107.644 |
How these estimates work
Straight-line distance uses the haversine formula on each city's coordinates. Road distance applies a circuity factor (~1.2–1.4×) and driving time a blended average speed. Flight time uses typical jet cruise speed plus ~30 minutes for taxi, climb and descent. Treat all figures as planning estimates.
Frequently asked questions
San Antonio to San Marcos is about 1,130 mi (1,819 km) in a straight line, and roughly 1,334 mi (2,147 km) by road.