AA 3876 then AA 4040 at DFW
Chattanooga → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:45AA 3876 from Chattanooga at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 42 apart on the timetable, overnight
AA 4040 leaves 23 h 42 after AA 3876 arrives on the timetable: more than half a day, so not a connection we count.