UA 5576 then DL 2544 at Denver
Rapid City → Denver → Salt Lake City
Timetable, Denver time
06:30UA 5576 from Rapid City at the gate
05:25DL 2544 to Salt Lake City leaves the gate
22 h 55 apart on the timetable, overnight
DL 2544 leaves 22 h 55 after UA 5576 arrives on the timetable: more than half a day, so not a connection we count.