UA 4794 then AA 9912 at O'Hare
South Bend → Chicago → Richmond
Timetable, Chicago time
09:00UA 4794 from South Bend at the gate
07:30AA 9912 to Richmond leaves the gate
22 h 30 apart on the timetable, overnight
AA 9912 leaves 22 h 30 after UA 4794 arrives on the timetable: more than half a day, so not a connection we count.