Gas Prices in San Antonio, TX
Updated May 21, 2026 · AAA data · Regular unleaded
Gas Prices in San Antonio
San Antonio consistently has among the lowest gas prices of any major US city, benefiting from Texas's low tax, good refinery pipeline access, and H-E-B Gas's dominant market presence. The Valero corporate headquarters is based here, giving the city an extra layer of supply stability.
Prices at individual stations can vary by 5–15 cents within the same city depending on brand, location, and local competition. Use apps like GasBuddy to find the cheapest station near you in San Antonio.
Frequently Asked Questions
What is the gas price in San Antonio right now?
The average regular unleaded price in San Antonio, Texas is $4.080/gal as of May 21, 2026. Station prices vary — expect a range of roughly $3.980 to $4.200 across the metro area.
Is San Antonio gas cheaper than Austin?
Yes — San Antonio typically runs 5-10¢ cheaper than Austin. SA has better pipeline access from Gulf Coast refineries and more established budget station infrastructure. H-E-B Gas is even more dominant in SA than in Austin.
What's the cheapest gas station chain in San Antonio?
H-E-B Gas is consistently the cheapest. Murphy USA at Walmart locations along Loop 1604 and I-10 are close seconds. Valero stations near the company's home turf often price competitively to maintain brand loyalty.
When is the cheapest day to buy gas in San Antonio?
Nationwide data shows Monday and Tuesday tend to have slightly lower gas prices before weekly demand picks up. Avoid buying gas Thursday through Saturday when prices are typically higher.