UA 3922 then AA 3626 at O'Hare
Savannah → Chicago → Springfield Branson National
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
20:49AA 3626 to Springfield Branson National leaves the gate
18 h 13 apart on the timetable
AA 3626 leaves 18 h 13 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.