AA 3724 then DL 454 at DFW
Brownsville → Dallas-Fort Worth → New York JFK
Timetable, Dallas-Fort Worth time
07:37AA 3724 from Brownsville at the gate
07:35DL 454 to New York JFK leaves the gate
23 h 58 apart on the timetable, overnight
DL 454 leaves 23 h 58 after AA 3724 arrives on the timetable: more than half a day, so not a connection we count.