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USA › Road trip gas calculator › Austin to San Antonio

Austin to San Antonio: gas cost

About 80 miles one way. Fuel cost at this week’s average regular price in Texas: $3.578 per gallon (EIA, week of Nov 2, 2026).

Fuel cost by vehicle

VehicleMPGGallonsOne wayRound trip
Compact car352.3$8.18$16.36
Midsize sedan302.7$9.54$19.08
SUV / crossover243.3$11.93$23.85
Pickup truck184.4$15.90$31.80

💡 A short hop on I-35 – one tank is more than enough for a round trip.

Calculate with your own numbers

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Los Angeles → Las Vegas270$51.68
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Jacksonville → Miami345$43.60
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Portland → San Francisco635$100.99
Los Angeles → Sacramento385$73.77
San Diego → Las Vegas330$63.23
San Diego → Phoenix355$68.02
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Phoenix → Las Vegas300$47.71
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Pittsburgh → Philadelphia305$43.03
Columbus → Chicago355$48.40
Cincinnati → Nashville275$37.49
Phoenix → Tucson115$18.29

FAQ

How much does it cost to drive from Austin to San Antonio?

At about 80 miles and this week’s average of $3.578 per gallon (Texas), a car averaging 30 MPG uses about 2.7 gallons – roughly $9.54 one way or $19.08 round trip.

How many gallons of gas from Austin to San Antonio?

About 2.3 gallons for a 35 MPG car, 3.3 for a 24 MPG SUV and 4.4 for an 18 MPG pickup.

Gas prices by state this week → · Gas price history → · More calculators →

Distances are approximate driving distances. Gas prices: U.S. Energy Information Administration weekly averages for regular gasoline; actual prices along the route vary.