Driving Time from Killeen to San Marcos
Driving from Killeen to San Marcos is about 1,350 mi and takes roughly 22 hr 52 min. See the fuel-cost estimate, distance and route tips.
Killeen and San Marcos are about 1,144 mi (1,842 km) apart in a straight line. By road that works out to roughly 1,350 mi (2,173 km), a drive of about 22 hr 52 min. A nonstop flight covers the great-circle distance in approximately 2 hr 36 min.
| Straight-line distance | 1,144 mi / 1,842 km |
| Road distance (est.) | 1,350 mi / 2,173 km |
| Driving time (est.) | 22 hr 52 min |
| Nonstop flight (est.) | 2 hr 36 min |
| Driving fuel (est., 1-way) | $169 |
| Typical flight fare | $200–$600 |
| Geographic midpoint | 32.504, -107.338 |
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
Killeen to San Marcos is about 1,144 mi (1,842 km) in a straight line, and roughly 1,350 mi (2,173 km) by road.