DL 550 then DL 1374 at Atlanta
New York LaGuardia → Atlanta → Louisville
Timetable, Atlanta time
08:26DL 550 from New York LaGuardia at the gate
07:34DL 1374 to Louisville leaves the gate
23 h 08 apart on the timetable, overnight
DL 1374 leaves 23 h 08 after DL 550 arrives on the timetable: more than half a day, so not a connection we count.