DL 2990 then DL 1892 at Atlanta
Jacksonville → Atlanta → Chattanooga
Timetable, Atlanta time
17:23DL 2990 from Jacksonville at the gate
14:30DL 1892 to Chattanooga leaves the gate
21 h 07 apart on the timetable, overnight
DL 1892 leaves 21 h 07 after DL 2990 arrives on the timetable: more than half a day, so not a connection we count.