Ontario Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Month Ago Avg. | $4.23 | $4.55 | $4.63 | $4.99 | - |
Highest Recorded Average Gas Price In Ontario Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.99 | 06/16/26 |
| Regular | $4.23 | 09/12/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Ontario
Love's in Ontario (1041 NW Washington Ave.)
1041 NW Washington Ave, Ontario, Oregon,
$4.59
Sep 20, 2026
0¢ Cashback
Love's in Ontario (1041 NW Washington Ave.)
1041 NW Washington AveOntarioOregon97914USA
Sinclair in Ontario (324 E Idaho Ave)
324 E Idaho Ave, Ontario, Oregon,
$4.79
Sep 20, 2026
0¢ Cashback
Sinclair in Ontario (324 E Idaho Ave)
324 E Idaho AveOntarioOregon97914USA
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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.