AA 4504 then UA 5616 at O'Hare
South Bend → Chicago → Peoria
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
17:10UA 5616 to Peoria leaves the gate
22 h 35 apart on the timetable, overnight
UA 5616 leaves 22 h 35 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.