AA 873 then DL 2511 at Atlanta
Chicago O'Hare → Atlanta → Rochester
Timetable, Atlanta time
10:23AA 873 from Chicago O'Hare at the gate
09:01DL 2511 to Rochester leaves the gate
22 h 38 apart on the timetable, overnight
DL 2511 leaves 22 h 38 after AA 873 arrives on the timetable: more than half a day, so not a connection we count.