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LiveUpdated May 20
Gas prices near 63121
Saint Louis, MO · MO average $4.19/gal
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Residents of 63121 can track current fuel costs throughout Saint Louis using our price tracker, which updates regularly across local stations. Missouri's location in the Midwest generally keeps prices lower than coastal states, though rates fluctuate based on market conditions and individual station markups.
Today’s lowest gas prices in 63121
- 1. Circle K at 1108 S Florissant Rd offers regular at $4.19/gal (2.6 mi away).
- 2. Phillips 66 at 9038 Natural Bridge Rd offers regular at $4.19/gal (1.7 mi away).
- 3. QuikTrip at 9099 Natural Bridge Rd offers regular at $4.29/gal (1.7 mi away).
- 4. Shell at 8835 Natural Bridge Rd offers regular at $4.29/gal (1.2 mi away).
- 5. Circle K at 5215 Lucas Hunt Rd offers regular at $4.32/gal (1.7 mi away).
Prices are aggregated from station-level data and refreshed daily.
Nearby ZIP codes in Saint Louis, MO
How to save more on gas in Saint Louis
1. Use warehouse clubs
Costco and Sam’s Club typically price 15-25 cents per gallon below nearby stations. Membership pays for itself within a few fill-ups.
2. Fill up early in the week
Stations often raise prices Thursday for weekend demand. Fill up Monday through Wednesday to avoid the lift.
3. Keep tires properly inflated
Properly inflated tires improve fuel economy by up to 3 percent at current prices. Check pressure once a month.
4. Check back tomorrow
Prices can shift 10-20 cents overnight during volatile markets. A quick check before you leave home avoids paying yesterday’s spike.
5. Pay cash at split-pricing stations
Stations with cash and credit split pricing typically save an average of 10 cents per gallon when you pay cash.
Related guides
Deep-dives on US gas-price topics relevant to this area.
Brand
Sam's Club gas prices
Member-only fuel pricing at Sam's Club warehouse-club locations.
Research
Why gas prices vary by station
The microeconomics of why same-brand stations across the street price 30 cents apart.
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Why gas prices rise faster than they fall
Asymmetric pass-through in US retail gasoline (rockets and feathers).
Directory
US gas station brands directory
Reference for 39 major US gas station chains.
About gas prices in Missouri
Missouri sits on PADD 2 pipeline supply with the Phillips 66 Wood River refinery just across the Mississippi in Roxana, Illinois, providing roughly 350,000 barrels per day of supply to the St. Louis metro. The state gas tax is around 27 cents per gallon, on the lower end of the Midwest. St. Louis, Kansas City, and Springfield all see competitive pricing, with QuikTrip (founded in Tulsa but with strong Missouri presence), Costco, Sam's Club, and Casey's General Store leading on value across all three metros. The Kansas City Missouri-Kansas border creates an interesting pricing dynamic, with stations on the Kansas side sometimes running a few cents below the Missouri side because of different state tax structures.