AA 4504 then UA 529 at O'Hare
South Bend → Chicago → New York LaGuardia
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
11:02UA 529 to New York LaGuardia leaves the gate
16 h 27 apart on the timetable, overnight
UA 529 leaves 16 h 27 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.