The average Illinois price for a gallon of regular unleaded is $2.20. This is six cents cheaper than last week's average.
AAA reports the most expensive gas can be found in the City of Chicago, at $2.58 per gallon. By contrast, the state's cheapest gas can be found in Champaign-Urbana, with an average per-gallon price of $1.95.
Rockford's average price is $2.14 per gallon.
