WN 562 then UA 5421 at Denver
New York LaGuardia → Denver → Lubbock
Timetable, Denver time
18:35WN 562 from New York LaGuardia at the gate
14:04UA 5421 to Lubbock leaves the gate
19 h 29 apart on the timetable, overnight
UA 5421 leaves 19 h 29 after WN 562 arrives on the timetable: more than half a day, so not a connection we count.