UA 2321 then DL 1697 at Phoenix
Newark → Phoenix → Boston
Timetable, Phoenix time
22:19UA 2321 from Newark at the gate
14:20DL 1697 to Boston leaves the gate
16 h 01 apart on the timetable, overnight
DL 1697 leaves 16 h 01 after UA 2321 arrives on the timetable: more than half a day, so not a connection we count.