UA 467 then AA 1976 at O'Hare
Cedar Rapids → Chicago → Puerto Vallarta
Timetable, Chicago time
09:30UA 467 from Cedar Rapids at the gate
08:43AA 1976 to Puerto Vallarta leaves the gate
23 h 13 apart on the timetable, overnight
AA 1976 leaves 23 h 13 after UA 467 arrives on the timetable: more than half a day, so not a connection we count.