UA 3532 then OO 6045 at O'Hare
Rochester (ROC) → Chicago → Grand Rapids
Timetable, Chicago time
11:59UA 3532 from Rochester (ROC) at the gate
09:40OO 6045 to Grand Rapids leaves the gate
21 h 41 apart on the timetable, overnight
OO 6045 leaves 21 h 41 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.