UA 3922 then AA 6469 at O'Hare
Savannah → Chicago → South Bend
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
18:50AA 6469 to South Bend leaves the gate
16 h 14 apart on the timetable
AA 6469 leaves 16 h 14 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.