AA 2550 then AA 6238 at DFW
Knoxville → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
18:58AA 2550 from Knoxville at the gate
08:25AA 6238 to Amarillo leaves the gate
13 h 27 apart on the timetable, overnight
AA 6238 leaves 13 h 27 after AA 2550 arrives on the timetable: more than half a day, so not a connection we count.