UA 6104 then AA 1682 at O'Hare
YIP → Chicago → Miami
Timetable, Chicago time
20:00UA 6104 from YIP at the gate
08:15AA 1682 to Miami leaves the gate
12 h 15 apart on the timetable, overnight
AA 1682 leaves 12 h 15 after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.