UA 3922 then AA 6460 at O'Hare
Savannah → Chicago → Lincoln
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
22:07AA 6460 to Lincoln leaves the gate
19 h 31 apart on the timetable
AA 6460 leaves 19 h 31 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.