AA 2398 then DL 1892 at Atlanta
Dallas-Fort Worth → Atlanta → Chattanooga
Timetable, Atlanta time
16:40AA 2398 from Dallas-Fort Worth at the gate
14:30DL 1892 to Chattanooga leaves the gate
21 h 50 apart on the timetable, overnight
DL 1892 leaves 21 h 50 after AA 2398 arrives on the timetable: more than half a day, so not a connection we count.