UA 5355 then UA 2159 at Denver
Salt Lake City → Denver → Kansas City
Timetable, Denver time
12:24UA 5355 from Salt Lake City at the gate
09:45UA 2159 to Kansas City leaves the gate
21 h 21 apart on the timetable, overnight
UA 2159 leaves 21 h 21 after UA 5355 arrives on the timetable: more than half a day, so not a connection we count.