UA 3922 then AA 3412 at O'Hare
Savannah → Chicago → Traverse City
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
21:30AA 3412 to Traverse City leaves the gate
18 h 54 apart on the timetable
AA 3412 leaves 18 h 54 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.