DL 9728 then WN 3874 at Salt Lake City
Los Angeles → Salt Lake City → Denver
Timetable, Salt Lake City time
12:25DL 9728 from Los Angeles at the gate
10:15WN 3874 to Denver leaves the gate
21 h 50 apart on the timetable, overnight
WN 3874 leaves 21 h 50 after DL 9728 arrives on the timetable: more than half a day, so not a connection we count.