UA 6104 then AA 1802 at O'Hare
South Bend → Chicago → San Diego
Timetable, Chicago time
19:00UA 6104 from South Bend at the gate
10:03AA 1802 to San Diego leaves the gate
15 h 03 apart on the timetable, overnight
AA 1802 leaves 15 h 03 after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.