UA 1978 then WN 131 at Denver
Jackson → Denver → Cancún
Timetable, Denver time
08:48UA 1978 from Jackson at the gate
08:45WN 131 to Cancún leaves the gate
23 h 57 apart on the timetable, overnight
WN 131 leaves 23 h 57 after UA 1978 arrives on the timetable: more than half a day, so not a connection we count.