DL 1237 then WN 198 at Atlanta
Sioux Falls → Atlanta → Nashville
Timetable, Atlanta time
09:00DL 1237 from Sioux Falls at the gate
21:35WN 198 to Nashville leaves the gate
12 h 35 apart on the timetable
WN 198 leaves 12 h 35 after DL 1237 arrives on the timetable: more than half a day, so not a connection we count.