AA 4504 then UA 5728 at O'Hare
South Bend → Chicago → Syracuse
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
13:38UA 5728 to Syracuse leaves the gate
19 h 03 apart on the timetable, overnight
UA 5728 leaves 19 h 03 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.