AA 4504 then H2 4920 at O'Hare
South Bend → Chicago → Milwaukee
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
13:33H2 4920 to Milwaukee leaves the gate
18 h 58 apart on the timetable, overnight
H2 4920 leaves 18 h 58 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.