AA 2550 then AA 2312 at DFW
Knoxville → Dallas-Fort Worth → Tulsa
Timetable, Dallas-Fort Worth time
18:58AA 2550 from Knoxville at the gate
18:11AA 2312 to Tulsa leaves the gate
23 h 13 apart on the timetable, overnight
AA 2312 leaves 23 h 13 after AA 2550 arrives on the timetable: more than half a day, so not a connection we count.