ET 3608 then DL 2503 at O'Hare
Anchorage → Chicago → New York LaGuardia
Timetable, Chicago time
07:16ET 3608 from Anchorage at the gate
20:25DL 2503 to New York LaGuardia leaves the gate
13 h 09 apart on the timetable
DL 2503 leaves 13 h 09 after ET 3608 arrives on the timetable: more than half a day, so not a connection we count.