UA 3501 then AA 3854 at O'Hare
Kansas City → Chicago → Rochester (RST)
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
14:20AA 3854 to Rochester (RST) leaves the gate
21 h 15 apart on the timetable, overnight
AA 3854 leaves 21 h 15 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.