AA 2600 then AA 4040 at DFW
Boston → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:31AA 2600 from Boston at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 56 apart on the timetable, overnight
AA 4040 leaves 23 h 56 after AA 2600 arrives on the timetable: more than half a day, so not a connection we count.