DL 1249 then DL 2563 at Atlanta
Miami → Atlanta → West Palm Beach
Timetable, Atlanta time
08:08DL 1249 from Miami at the gate
20:45DL 2563 to West Palm Beach leaves the gate
12 h 37 apart on the timetable
DL 2563 leaves 12 h 37 after DL 1249 arrives on the timetable: more than half a day, so not a connection we count.