UA 6104 then AA 312 at O'Hare
South Bend → Chicago → Dallas-Fort Worth
Timetable, Chicago time
19:00UA 6104 from South Bend at the gate
10:00AA 312 to Dallas-Fort Worth leaves the gate
15 h apart on the timetable, overnight
AA 312 leaves 15 h after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.