OO 225 then UA 2809 at O'Hare
Richmond → Chicago → Dallas-Fort Worth
Timetable, Chicago time
11:48OO 225 from Richmond at the gate
10:40UA 2809 to Dallas-Fort Worth leaves the gate
22 h 52 apart on the timetable, overnight
UA 2809 leaves 22 h 52 after OO 225 arrives on the timetable: more than half a day, so not a connection we count.