DL 1553 then WN 1749 at Denver
Salt Lake City → Denver → Dallas
Timetable, Denver time
12:03DL 1553 from Salt Lake City at the gate
06:05WN 1749 to Dallas leaves the gate
18 h 02 apart on the timetable, overnight
WN 1749 leaves 18 h 02 after DL 1553 arrives on the timetable: more than half a day, so not a connection we count.