via I-15
The drive from Las Vegas to San Antonio takes approximately 23h 11min, covering 1392 miles via I-15. Under normal conditions, expect to spend around $162 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 32–33+ 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.
The Vegas highway. Friday/Sunday traffic between LA and Vegas can be extreme — plan accordingly.
You'll likely need 3 fuel stops along the way.
For a long drive like Las Vegas 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 ~2h 47m 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:
The journey from Las Vegas to San Antonio stretches 1392 miles along I-15 and typically takes 23h 11min to complete. At today's fuel prices, expect to spend around $162 on gas. Departing during mid-morning (9-11 am) gives you the best chance of avoiding congestion along the way.
This 1392-mile trek is a true American road trip. Stock up on audiobooks or podcasts, rotate drivers if possible, and build in time for roadside attractions. The journey itself is part of the adventure. Popular stopping points include White Sands, El Paso, Carlsbad Caverns — great options for grabbing a meal, fueling up, or stretching your legs.