AA 5672 then AA 4040 at DFW
Knoxville → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:38AA 5672 from Knoxville at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 49 apart on the timetable, overnight
AA 4040 leaves 23 h 49 after AA 5672 arrives on the timetable: more than half a day, so not a connection we count.