DL 514 then AA 3381 at Phoenix
Boston → Phoenix → Monterrey
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
13:27AA 3381 to Monterrey leaves the gate
15 h 34 apart on the timetable, overnight
AA 3381 leaves 15 h 34 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.