O'fallon Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $4.1 | $4.58 | $4.94 | $4.66 | - |
| Month Ago Avg. | $4.1 | $4.58 | $4.94 | $4.66 | - |
Highest Recorded Average Gas Price In O'fallon Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.66 | 03/13/26 |
| Regular | $4.1 | 03/18/26 |
Top 10 Gas Stations & Cheap Fuel Prices in O'fallon
MotoMart in O'Fallon (8401 US-50)
8401 US-50, O'Fallon, Illinois,
$3.74
Mar 29, 2026
0¢ Cashback
Shell in O'Fallon (1011 W US-50)
1011 US-50, O'Fallon, Illinois,
$3.82
Mar 29, 2026
3¢ Cashback
Shell in O'Fallon (203 Scott Troy Rd)
203 Scott Troy Rd, O'Fallon, Illinois,
$3.85
Mar 29, 2026
3¢ Cashback
Circle K in O'Fallon (826 W US-50)
826 W US-50, O'Fallon, Illinois,
$3.97
Mar 29, 2026
0¢ Cashback
Circle K in O Fallon (320 W State St)
320 W State St, O'Fallon, Illinois,
$3.97
Mar 29, 2026
0¢ Cashback
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Gas Data Methodology
The fuel prices published in this guide are based on the results of research completed by Way.com’s data team. Using a mix of external and internal data, we analyzed millions of prices across U.S. ZIP codes and globally.