AA 5304 then AA 4040 at DFW
Mobile → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:35AA 5304 from Mobile at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 52 apart on the timetable, overnight
AA 4040 leaves 23 h 52 after AA 5304 arrives on the timetable: more than half a day, so not a connection we count.