UA 971 then AA 9912 at O'Hare
Rome → Chicago → Richmond
Timetable, Chicago time
13:10UA 971 from Rome at the gate
07:30AA 9912 to Richmond leaves the gate
18 h 20 apart on the timetable, overnight
AA 9912 leaves 18 h 20 after UA 971 arrives on the timetable: more than half a day, so not a connection we count.