UA 5520 then WN 581 at Denver
Carlsbad McClellan-Palomar → Denver → Nashville
Timetable, Denver time
12:05UA 5520 from Carlsbad McClellan-Palomar at the gate
07:55WN 581 to Nashville leaves the gate
19 h 50 apart on the timetable, overnight
WN 581 leaves 19 h 50 after UA 5520 arrives on the timetable: more than half a day, so not a connection we count.