DL 26 then DL 1892 at Atlanta
Seoul → Atlanta → Chattanooga
Timetable, Atlanta time
18:55DL 26 from Seoul at the gate
14:30DL 1892 to Chattanooga leaves the gate
19 h 35 apart on the timetable, overnight
DL 1892 leaves 19 h 35 after DL 26 arrives on the timetable: more than half a day, so not a connection we count.