The drive from Denver to San Antonio takes approximately 17h 22min, covering 1042 miles via I-70. Under normal conditions, expect to spend around $121 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 24–25+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic Estimate
🟢 Light traffic
14h 46m
🔵 Typical
17h 22min
🔴 Heavy traffic
25h 11m
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Trip Details
Distance1042 miles (1676 km)
Drive Time17h 22min
RouteI-70
Best TimeMid-morning (9-11 AM)
Fuel Costs
Gas (30 mpg)~34.7 gallons
Est. Cost$121
Route Tips: I-70
Crosses the Rocky Mountains with stunning scenery. Mountain passes can be challenging in winter.
You'll likely need 2 fuel stops along the way.
Best Time to Drive from Denver to San Antonio
For a long drive like Denver 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.
🟢 Best:Mid-morning (9-11 AM)
🔴 Avoid:Rush hour (4-7 PM)
Driving vs Flying
🚗 Driving
17h 22min
~$121 gas
✈️ Flying
4h 35m
~$156–$365 flight
✈️ Flying is faster when you factor in airport time. Flight time is ~2h 5m but add ~2.5 hours for check-in, security, and boarding.
All Travel Options
🚗 Drive
17h 22min
~$121
🚌 Bus
23h 9m
~$83–$188
🚂 Train
18h 57m
~$125–$313
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Suggested Stops
Popular cities along the route for rest, food, or fuel:
📍 Carlsbad Caverns
📍 Oklahoma City
📍 Santa Fe
Frequently Asked Questions
How long does it take to drive from Denver to San Antonio?
The drive from Denver to San Antonio takes approximately 17h 22min covering 1042 miles via I-70. Actual time may vary based on traffic, weather, and road conditions.
How much does gas cost for Denver to San Antonio?
At 30 MPG and $3.50/gallon, expect to spend approximately $121 on gas for this 1042-mile trip. You'll need about 34.7 gallons of fuel.
What is the best time to drive from Denver to San Antonio?
Mid-morning (9-11 AM) to avoid heavy traffic. Weekday mornings before 7 AM or evenings after 7 PM typically have less congestion.
Are there tolls on the Denver to San Antonio route?
Yes, expect approximately $31 in tolls along this route. Consider getting a TxTag transponder for faster toll payment.
