UA 6104 then AA 3340 at O'Hare
South Bend → Chicago → Nashville
Timetable, Chicago time
19:00UA 6104 from South Bend at the gate
08:20AA 3340 to Nashville leaves the gate
13 h 20 apart on the timetable, overnight
AA 3340 leaves 13 h 20 after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.