O Fallon, MO
6 stations
LiveUpdated Jul 10Gas prices near 63366
O Fallon, MO · MO average $3.47/gal
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Gas Price Check
O Fallon, MO · 63366
- Cheapest
- $3.36/gal
- Area avg
- $3.47/gal
You save11¢/gal
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Gas prices in O Fallon, Missouri (63366) reflect typical Midwest trends, generally running lower than coastal states. Prices vary considerably between stations throughout the area, so checking current rates before filling up makes sense. Our platform updates regularly to help you find the best available prices in your neighborhood.
Today’s lowest gas prices in 63366
- 1. Zephyr Xpress at 1060 Bryan Rd offers regular at $3.36/gal (3.7 mi away).
- 2. Phillips 66 at 102 McDonald Ln offers regular at $3.37/gal (4.3 mi away).
- 3. QuikTrip at 955 Bryan Rd offers regular at $3.39/gal (3.7 mi away).
- 4. Phillips 66 at 914 Bryan Rd offers regular at $3.39/gal (3.5 mi away).
- 5. Phillips 66 at 1001 Tom Ginnever Ave offers regular at $3.39/gal (4.4 mi away).
Prices are aggregated from station-level data and refreshed daily.
Nearby ZIP codes in O Fallon, MO
How to save more on gas in O Fallon
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.
Research
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.