DL 4237 then F9 4695 at Salt Lake City
St George → Salt Lake City → Las Vegas
Timetable, Salt Lake City time
10:11DL 4237 from St George at the gate
09:28F9 4695 to Las Vegas leaves the gate
23 h 17 apart on the timetable, overnight
F9 4695 leaves 23 h 17 after DL 4237 arrives on the timetable: more than half a day, so not a connection we count.