DL 905 then DL 518 at Atlanta
Salt Lake City → Atlanta → Boston
Timetable, Atlanta time
23:00DL 905 from Salt Lake City at the gate
16:25DL 518 to Boston leaves the gate
17 h 25 apart on the timetable, overnight
DL 518 leaves 17 h 25 after DL 905 arrives on the timetable: more than half a day, so not a connection we count.