WN 562 then DL 1553 at Denver
New York LaGuardia → Denver → Salt Lake City
Timetable, Denver time
18:35WN 562 from New York LaGuardia at the gate
12:53DL 1553 to Salt Lake City leaves the gate
18 h 18 apart on the timetable, overnight
DL 1553 leaves 18 h 18 after WN 562 arrives on the timetable: more than half a day, so not a connection we count.