Fuel cost calculator · About 80 miles
Gas cost from Austin to San Antonio
The drive from Austin, TX to San Antonio, TX is about 80 miles, so a round trip costs about $19.08 in gas at this week's average of $3.58 a gallon. Change the car, fuel or distance below for your own figure.
What the trip costs by vehicle
| Vehicle | One way | Round trip |
|---|---|---|
| Compact car (33 mpg) | $8.67 | $17.35 |
| Midsize sedan (30 mpg) | $9.54 | $19.08 |
| Hybrid (50 mpg) | $5.72 | $11.45 |
| Minivan (22 mpg) | $13.01 | $26.02 |
| SUV (24 mpg) | $11.93 | $23.85 |
| Pickup truck (19 mpg) | $15.07 | $30.13 |
Regular gas at $3.578 a gallon, this week's Texas price, from the EIA’s weekly survey. Fuel only: tolls and parking are not included.
Fuel economy figures are round examples for each kind of vehicle, not official ratings. Your own car's EPA rating is on fueleconomy.gov.
Distance: fastest route between city centres, rounded to the nearest 5 miles, calculated with OSRM on OpenStreetMap road data (© OpenStreetMap contributors), measured November 2026.
80 miles in Texas
$9.54
2.7 gallons at $3.58 a gallon
$1.53 less than the same trip at the national average.
- Per mile
- 11.9¢
- A full tank
- $53.67
- about 450 miles
- A year of driving
- $1,431
- $119 a month
Austin to San Antonio by car
- How much does gas cost from Austin to San Antonio?
- About $9.54 one way, or $19.08 for the round trip, in a car that gets 30 mpg. That assumes 80 miles and this week's average regular price of $3.58 a gallon. An SUV at 24 mpg spends about $11.93 one way; a hybrid at 50 mpg about $5.72.
- How far is Austin from San Antonio by car?
- About 80 miles on the fastest route between the two city centres, measured on OpenStreetMap road data. Your own start and end points may make it a little longer or shorter; type your distance into the calculator for an exact figure.
- How many gallons of gas does the drive take?
- About 2.7 gallons one way at 30 mpg. That fits in a typical 15-gallon tank, so most cars can make it without stopping for fuel.