UA 6104 then AA 3428 at O'Hare
South Bend → Chicago → Pensacola
Timetable, Chicago time
19:00UA 6104 from South Bend at the gate
08:00AA 3428 to Pensacola leaves the gate
13 h apart on the timetable, overnight
AA 3428 leaves 13 h after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.