The average Illinois price for a gallon of regular unleaded gasoline is $2.44. This is 9 cents cheaper than last week.
AAA reports the most expensive gas can be found in the City of Chicago, at $2.82 per gallon. By contrast, Decatur has the cheapest gas, at $2.19 per gallon.
Rockford's average gas price is $2.43. This is 5 cents cheaper than last week.