AA 2880 then DL 1892 at Atlanta
Miami → Atlanta → Chattanooga
Timetable, Atlanta time
16:15AA 2880 from Miami at the gate
14:30DL 1892 to Chattanooga leaves the gate
22 h 15 apart on the timetable, overnight
DL 1892 leaves 22 h 15 after AA 2880 arrives on the timetable: more than half a day, so not a connection we count.