DL 5597 then DL 445 at Boston
Jacksonville → Boston → Salt Lake City
Timetable, Boston time
16:37DL 5597 from Jacksonville at the gate
16:15DL 445 to Salt Lake City leaves the gate
23 h 38 apart on the timetable, overnight
DL 445 leaves 23 h 38 after DL 5597 arrives on the timetable: more than half a day, so not a connection we count.