WN 2188 then DL 1892 at Atlanta
Dallas → Atlanta → Chattanooga
Timetable, Atlanta time
19:00WN 2188 from Dallas at the gate
14:30DL 1892 to Chattanooga leaves the gate
19 h 30 apart on the timetable, overnight
DL 1892 leaves 19 h 30 after WN 2188 arrives on the timetable: more than half a day, so not a connection we count.