The average Illinois price for a gallon of regular unleaded gasoline is $2.39. This is four cents cheaper than last week.
AAA reportsthe most expensive gas can be found in the City of Chicago, at $2.78 per gallon. In contrast, the cheapest gasoline is in Champaign-Urbana, at $2.14 per gallon
Rockford's average price is $2.34 per gallon -- three cents cheaper than last week's average.
