WN 120 then UA 5421 at Denver
Kansas City → Denver → Lubbock
Timetable, Denver time
15:20WN 120 from Kansas City at the gate
14:04UA 5421 to Lubbock leaves the gate
22 h 44 apart on the timetable, overnight
UA 5421 leaves 22 h 44 after WN 120 arrives on the timetable: more than half a day, so not a connection we count.