WN 1640 then WN 643 at Denver
Tucson → Denver → Orlando
Timetable, Denver time
17:35WN 1640 from Tucson at the gate
13:25WN 643 to Orlando leaves the gate
19 h 50 apart on the timetable, overnight
WN 643 leaves 19 h 50 after WN 1640 arrives on the timetable: more than half a day, so not a connection we count.