UA 5192 then AA 4920 at O'Hare
Jacksonville → Chicago → Milwaukee
Timetable, Chicago time
17:30UA 5192 from Jacksonville at the gate
13:20AA 4920 to Milwaukee leaves the gate
19 h 50 apart on the timetable, overnight
AA 4920 leaves 19 h 50 after UA 5192 arrives on the timetable: more than half a day, so not a connection we count.