Driving from Phoenix to San Antonio: 872 Miles, ~13.5 Hours

The most direct route from Phoenix, AZ to San Antonio, TX covers 872 miles (1,403 km) via I-10 East, taking approximately 13 hours 18 minutes of pure driving time.

Route Overview

Phoenix → (I-10) → Tucson → Las Cruces, NM → El Paso, TX → (Mountain/ Central time zone change) → Van Horn → Fort Stockton → Junction → Kerrville → San Antonio.

Key Considerations

• Time zones: Arizona (MST year-round) → Texas (CST/CDT); gain 1 hour in winter, same in summer
• Fuel stops: 3–4 tanks needed (typical 300-mile range); plan for West Texas gaps
• Border Patrol: Permanent checkpoint on I-10 west of Van Horn
• Weather: Summer heat (110°F+), winter ice (West Texas), spring dust storms
• Rest areas: Texas maintains clean, safe facilities every 30–50 miles

Alternative Routes

I-40 to I-27 to I-20 (northern route) adds ~100 miles but avoids El Paso traffic. US-70/US-54 through White Sands Missile Range area is scenic but slower.

Real-time conditions: DriveTexas.org and AZ511.gov.