AM 978 then DL 1481 at Atlanta
Monterrey → Atlanta → Louisville
Timetable, Atlanta time
10:55AM 978 from Monterrey at the gate
10:35DL 1481 to Louisville leaves the gate
23 h 40 apart on the timetable, overnight
DL 1481 leaves 23 h 40 after AM 978 arrives on the timetable: more than half a day, so not a connection we count.