DL 1223 then AA 4478 at Atlanta
Cincinnati → Atlanta → New York LaGuardia
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
12:36AA 4478 to New York LaGuardia leaves the gate
20 h 03 apart on the timetable, overnight
AA 4478 leaves 20 h 03 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.