UA 302 then UA 447 at Denver
Detroit → Denver → Knoxville
Timetable, Denver time
10:17UA 302 from Detroit at the gate
10:15UA 447 to Knoxville leaves the gate
23 h 58 apart on the timetable, overnight
UA 447 leaves 23 h 58 after UA 302 arrives on the timetable: more than half a day, so not a connection we count.