via I-10
The drive from Phoenix to San Antonio takes approximately 12h 0min, covering 850 miles via I-10. Under normal conditions, expect to spend around $99 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 17–18+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Stretches coast-to-coast from LA to Jacksonville. Desert sections in Arizona/New Mexico can be monotonous — bring plenty of water.
You'll likely need 1 fuel stop along the way.
For a long drive like Phoenix to San Antonio, plan to depart early in the morning. This lets you cover most of the distance before afternoon traffic builds up. Consider breaking the trip with a lunch stop midway.
✈️ Flying is faster when you factor in airport time. Flight time is ~1h 42m but add ~2.5 hours for check-in, security, and boarding.
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Popular cities along the route for rest, food, or fuel:
Planning a trip from Phoenix to San Antonio? The most common route runs along I-10, covering 850 miles in about 12h 0min. Gas will set you back roughly $99 for the one-way trip. For the best experience, hit the road during early morning (6-8 am) when traffic is lightest.
Covering 850 miles, this epic drive takes you across a huge swath of the country. Prepare for varied weather conditions, different speed limits by state, and long stretches between services. A well-planned itinerary makes all the difference. Popular stopping points include Carlsbad Caverns, El Paso, White Sands — great options for grabbing a meal, fueling up, or stretching your legs.