O'fallon Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $3.41 | $3.71 | $4.04 | $3.94 | - |
| Month Ago Avg. | $3.41 | $3.71 | $4.04 | $3.94 | - |
Highest Recorded Average Gas Price In O'fallon Year to Date
| Price | Date | |
|---|---|---|
| Regular | $3.48 | 07/19/25 |
| Diesel | $3.95 | 09/14/25 |
Top 10 Gas Stations & Cheap Fuel Prices in O'fallon
BP in O'Fallon (3995 Crusher Dr)
3995 Crusher Dr, O'Fallon, Missouri,
$3.01
Dec 29, 2025
0¢ Cashback
Phillips 66 in O'fallon (914 Bryan Rd)
914 Bryan Rd, O'Fallon, Missouri,
$3.03
Dec 29, 2025
0¢ Cashback
Zephyr Xpress in O'Fallon (1060 Bryan Rd)
1060 Bryan Rd, O'Fallon, Missouri,
$3.08
Dec 29, 2025
0¢ Cashback
Phillips 66 in O'Fallon (1001 Tom Ginnever Ave)
1001 Tom Ginnever Ave, O'Fallon, Missouri,
$3.09
Dec 29, 2025
0¢ Cashback
QuikTrip in O'Fallon (801 Belleau Creek Rd)
801 Belleau Creek Rd, O'Fallon, Missouri,
$3.11
Dec 29, 2025
0¢ Cashback
Phillips 66 in O'Fallon (102 McDonald Ln)
102 McDonald Ln, O'Fallon, Missouri,
$3.14
Dec 29, 2025
0¢ Cashback
Mobil in O'Fallon (879 Bryan Rd)
879 Bryan Rd, O'Fallon, Missouri,
$3.16
Dec 29, 2025
0¢ Cashback
Phillips 66 in O'Fallon (7430 MO-N)
7430 MO-N, O'Fallon, Missouri,
$3.19
Dec 29, 2025
0¢ Cashback
QuikTrip in O'Fallon (1150 Feise Rd)
1150 Feise Rd, O'Fallon, Missouri,
$3.19
Dec 29, 2025
0¢ Cashback
QuikTrip in O'Fallon (955 Bryan Rd)
955 Bryan Rd, O'Fallon, Missouri,
$3.19
Dec 29, 2025
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.