DL 1680 then AA 5456 at Atlanta
Cincinnati → Atlanta → Philadelphia
Timetable, Atlanta time
21:43DL 1680 from Cincinnati at the gate
13:31AA 5456 to Philadelphia leaves the gate
15 h 48 apart on the timetable, overnight
AA 5456 leaves 15 h 48 after DL 1680 arrives on the timetable: more than half a day, so not a connection we count.