WN 993 then UA 447 at Denver
Baltimore → Denver → Knoxville
Timetable, Denver time
10:20WN 993 from Baltimore at the gate
10:15UA 447 to Knoxville leaves the gate
23 h 55 apart on the timetable, overnight
UA 447 leaves 23 h 55 after WN 993 arrives on the timetable: more than half a day, so not a connection we count.