DL 1867 then DL 1393 at Atlanta
St. George → Atlanta → St Louis
Timetable, Atlanta time
19:50DL 1867 from St. George at the gate
17:30DL 1393 to St Louis leaves the gate
21 h 40 apart on the timetable, overnight
DL 1393 leaves 21 h 40 after DL 1867 arrives on the timetable: more than half a day, so not a connection we count.