AA 3975 then AA 4040 at DFW
Memphis → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:39AA 3975 from Memphis at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 48 apart on the timetable, overnight
AA 4040 leaves 23 h 48 after AA 3975 arrives on the timetable: more than half a day, so not a connection we count.