UA 595 then UA 447 at Denver
Fort Myers → Denver → Knoxville
Timetable, Denver time
10:22UA 595 from Fort Myers at the gate
10:15UA 447 to Knoxville leaves the gate
23 h 53 apart on the timetable, overnight
UA 447 leaves 23 h 53 after UA 595 arrives on the timetable: more than half a day, so not a connection we count.