UA 3501 then AA 1976 at O'Hare
Kansas City → Chicago → Puerto Vallarta
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
08:43AA 1976 to Puerto Vallarta leaves the gate
15 h 38 apart on the timetable, overnight
AA 1976 leaves 15 h 38 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.