San Antonio, United States → Houston, United States
164 nautical miles · Direction: east
The straight-line distance from San Antonio to Houston is 304 km (189 miles). Houston lies roughly east of San Antonio; the initial great-circle bearing is 82° (E). It is a domestic route within United States.
San Antonio (South, United States) sits at 29.4241°N, 98.4936°W; Houston (South, United States) is at 29.7604°N, 95.3698°W. The initial great-circle bearing is 82° (E); on a great circle the heading changes along the way.
| Mode | Figure | Basis |
|---|---|---|
| ✈️ Flight | ~53 min | Estimate: 800 km/h + 30 min taxi. Not a schedule; total trip time is longer. |
| 🚗 Road | ~396 km · ~4h 57min | Rough estimate: straight line × 1.3 at 80 km/h. Not live routing. |
| 🚆 Rail | No timetable data | Same landmass, so rail may exist — check an operator. |
Rough road-length estimate for San Antonio to Houston: about 396 km. This is an estimate, not a routed drive — the actual road distance depends on the road network, crossings and the route chosen.
The geographic halfway point of the great-circle path between San Antonio and Houston lies at approximately 29.6014°N, 96.9343°W — the position that is an equal 152 km from each city along that path. It is a geometric midpoint, not a halfway point by road.
San Antonio and Houston both use the America/Chicago time zone, so there is no normal clock difference between them.
The straight-line distance from San Antonio to Houston is approximately 304 km (189 miles, 164 nautical miles).
Houston lies roughly east of San Antonio; the initial great-circle bearing is 82° (E).
Estimated flight time is about 53 min (great-circle distance at 800 km/h plus 30 min for taxi, take-off and landing). It is not an airline schedule; total airport-to-airport trip time is longer.
Rough road-length estimate for San Antonio to Houston: about 396 km. This is an estimate, not a routed drive — the actual road distance depends on the road network, crossings and the route chosen.
San Antonio and Houston both use the America/Chicago time zone, so there is no normal clock difference between them.
Straight-line distance uses the great-circle (Haversine) method. Flight and road figures, where shown, are estimates rather than schedules or live routing. How SnapDistance calculates distances