Question 1

What is the average gas price in O Fallon, Illinois?

Accepted Answer

The current average gas price in O Fallon, Illinois is $3.48, based on 1 stations tracked by GasWiser.

Question 2

Where is the cheapest gas in O Fallon?

Accepted Answer

The cheapest reported gas in O Fallon is $3.48. Use the filters above to sort stations by price or by brand.

Question 3

Are these gas prices updated in real time?

Accepted Answer

GasWiser refreshes prices throughout the day from station-reported and crowd-sourced data, so prices reflect the latest available information.

Gas Prices in O Fallon, IL

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