F9 2350 then DL 1553 at Denver
Las Vegas → Denver → Salt Lake City
Timetable, Denver time
14:41F9 2350 from Las Vegas at the gate
12:53DL 1553 to Salt Lake City leaves the gate
22 h 12 apart on the timetable, overnight
DL 1553 leaves 22 h 12 after F9 2350 arrives on the timetable: more than half a day, so not a connection we count.