AA 3735 then F9 4069 at DFW
Knoxville → Dallas-Fort Worth → Denver
Timetable, Dallas-Fort Worth time
17:43AA 3735 from Knoxville at the gate
14:39F9 4069 to Denver leaves the gate
20 h 56 apart on the timetable, overnight
F9 4069 leaves 20 h 56 after AA 3735 arrives on the timetable: more than half a day, so not a connection we count.