UA 2791 then WN 643 at Denver
Jackson → Denver → Orlando
Timetable, Denver time
16:06UA 2791 from Jackson at the gate
13:25WN 643 to Orlando leaves the gate
21 h 19 apart on the timetable, overnight
WN 643 leaves 21 h 19 after UA 2791 arrives on the timetable: more than half a day, so not a connection we count.