UA 644 then WN 500 at Denver
Dallas-Fort Worth → Denver → Kansas City
Timetable, Denver time
10:14UA 644 from Dallas-Fort Worth at the gate
07:30WN 500 to Kansas City leaves the gate
21 h 16 apart on the timetable, overnight
WN 500 leaves 21 h 16 after UA 644 arrives on the timetable: more than half a day, so not a connection we count.