UA 3922 then AA 1812 at O'Hare
Savannah → Chicago → Miami
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
16:43AA 1812 to Miami leaves the gate
14 h 07 apart on the timetable
AA 1812 leaves 14 h 07 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.