AA 2550 then AA 1408 at DFW
Knoxville → Dallas-Fort Worth → Huatulco
Timetable, Dallas-Fort Worth time
18:58AA 2550 from Knoxville at the gate
10:49AA 1408 to Huatulco leaves the gate
15 h 51 apart on the timetable, overnight
AA 1408 leaves 15 h 51 after AA 2550 arrives on the timetable: more than half a day, so not a connection we count.