WN 1881 then UA 5421 at Denver
Albuquerque → Denver → Lubbock
Timetable, Denver time
14:05WN 1881 from Albuquerque at the gate
14:04UA 5421 to Lubbock leaves the gate
23 h 59 apart on the timetable, overnight
UA 5421 leaves 23 h 59 after WN 1881 arrives on the timetable: more than half a day, so not a connection we count.