I haven’t seen in Chicago, but in Calumet City and on the tollway it was around $3.98. Around $3.52 at one station in NW Indiana, but in the $3.70 range elsewhere.
All we have to do is head west to Dixon, north to Rockford or south to Mendota and we’ll find cheaper gas. We’re always higher than around us (except to the east). But it makes no sense to drive that far to fill up. But my wife works in Rockford, so she plans it to fill up there as much as she can. As for right here, the Casey’s in Creston (5 miles east of us) has the cheapest gas always, by about 5-8¢/gal.