The average Illinois price for a gallon of regular unleaded is $2.48. This is 3 cents cheaper than last week's average.
AAA reports the most expensive gas can be found in the City of Chicago, at $2.84 per gallon. Meanwhile, Springfield has the cheapest gas, at $2.22 per gallon.
Rockford's average price is $2.39 per gallon. This is 1 cent cheaper than last week's average.