WN 1311 then DL 5721 at Boston
Austin → Boston → New York LaGuardia
Timetable, Boston time
17:50WN 1311 from Austin at the gate
17:00DL 5721 to New York LaGuardia leaves the gate
23 h 10 apart on the timetable, overnight
DL 5721 leaves 23 h 10 after WN 1311 arrives on the timetable: more than half a day, so not a connection we count.