UA 5355 then UA 231 at Denver
Salt Lake City → Denver → Charlotte
Timetable, Denver time
12:24UA 5355 from Salt Lake City at the gate
10:02UA 231 to Charlotte leaves the gate
21 h 38 apart on the timetable, overnight
UA 231 leaves 21 h 38 after UA 5355 arrives on the timetable: more than half a day, so not a connection we count.