OO 225 then UA 4791 at O'Hare
Richmond → Chicago → South Bend
Timetable, Chicago time
11:48OO 225 from Richmond at the gate
10:25UA 4791 to South Bend leaves the gate
22 h 37 apart on the timetable, overnight
UA 4791 leaves 22 h 37 after OO 225 arrives on the timetable: more than half a day, so not a connection we count.