UA 2613 then WN 643 at Denver
Houston → Denver → Orlando
Timetable, Denver time
16:30UA 2613 from Houston at the gate
13:25WN 643 to Orlando leaves the gate
20 h 55 apart on the timetable, overnight
WN 643 leaves 20 h 55 after UA 2613 arrives on the timetable: more than half a day, so not a connection we count.