DL 2664 then DL 1374 at Atlanta
Buffalo → Atlanta → Louisville
Timetable, Atlanta time
08:15DL 2664 from Buffalo at the gate
07:45DL 1374 to Louisville leaves the gate
23 h 30 apart on the timetable, overnight
DL 1374 leaves 23 h 30 after DL 2664 arrives on the timetable: more than half a day, so not a connection we count.