UA 5192 then AA 1247 at O'Hare
Jacksonville → Chicago → New York LaGuardia
Timetable, Chicago time
17:30UA 5192 from Jacksonville at the gate
14:31AA 1247 to New York LaGuardia leaves the gate
21 h 01 apart on the timetable, overnight
AA 1247 leaves 21 h 01 after UA 5192 arrives on the timetable: more than half a day, so not a connection we count.