DL 1867 then DL 518 at Atlanta
St. George → Atlanta → Boston
Timetable, Atlanta time
19:50DL 1867 from St. George at the gate
16:25DL 518 to Boston leaves the gate
20 h 35 apart on the timetable, overnight
DL 518 leaves 20 h 35 after DL 1867 arrives on the timetable: more than half a day, so not a connection we count.