WN 3660 then DL 1697 at Phoenix
Las Vegas → Phoenix → Boston
Timetable, Phoenix time
19:30WN 3660 from Las Vegas at the gate
14:20DL 1697 to Boston leaves the gate
18 h 50 apart on the timetable, overnight
DL 1697 leaves 18 h 50 after WN 3660 arrives on the timetable: more than half a day, so not a connection we count.