UA 3922 then AA 3635 at O'Hare
Savannah → Chicago → La Crosse
Timetable, Chicago time
02:36UA 3922 from Savannah at the gate
16:50AA 3635 to La Crosse leaves the gate
14 h 14 apart on the timetable
AA 3635 leaves 14 h 14 after UA 3922 arrives on the timetable: more than half a day, so not a connection we count.