AA 4504 then UA 6045 at O'Hare
South Bend → Chicago → Grand Rapids
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
09:15UA 6045 to Grand Rapids leaves the gate
14 h 40 apart on the timetable, overnight
UA 6045 leaves 14 h 40 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.