The average Illinois price for a gallon of regular unleaded is $2.51. This is 9 cents more expensive than last week.
AAA reports the most expensive gas can be found in the City of Chicago, at $2.83 per gallon. By contrast, Springfield has the cheapest gas, at $2.30 per gallon.
Rockford's average per-gallon price is $2.40. This is 9 cents more expensive than last week.
