AA 1414 then UA 447 at Denver
Phoenix Sky Harbor → Denver → Knoxville
Timetable, Denver time
10:43AA 1414 from Phoenix Sky Harbor at the gate
10:15UA 447 to Knoxville leaves the gate
23 h 32 apart on the timetable, overnight
UA 447 leaves 23 h 32 after AA 1414 arrives on the timetable: more than half a day, so not a connection we count.