OO 225 then UA 4445 at O'Hare
Richmond → Chicago → Birmingham (Alabama)
Timetable, Chicago time
11:48OO 225 from Richmond at the gate
10:29UA 4445 to Birmingham (Alabama) leaves the gate
22 h 41 apart on the timetable, overnight
UA 4445 leaves 22 h 41 after OO 225 arrives on the timetable: more than half a day, so not a connection we count.