AA 1403 then AA 3898 at DFW
Baltimore → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
09:36AA 1403 from Baltimore at the gate
21:40AA 3898 to Brownsville leaves the gate
12 h 04 apart on the timetable
AA 3898 leaves 12 h 04 after AA 1403 arrives on the timetable: more than half a day, so not a connection we count.