WN 4251 then DL 1697 at Phoenix
San Diego → Phoenix → Boston
Timetable, Phoenix time
22:00WN 4251 from San Diego at the gate
14:20DL 1697 to Boston leaves the gate
16 h 20 apart on the timetable, overnight
DL 1697 leaves 16 h 20 after WN 4251 arrives on the timetable: more than half a day, so not a connection we count.