UA 3501 then UA 1239 at O'Hare
Kansas City → Chicago → Rochester (ROC)
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
13:57UA 1239 to Rochester (ROC) leaves the gate
20 h 52 apart on the timetable, overnight
UA 1239 leaves 20 h 52 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.