WN 2409 then DL 514 at Phoenix
Las Vegas → Phoenix → Boston
Timetable, Phoenix time
07:20WN 2409 from Las Vegas at the gate
23:23DL 514 to Boston leaves the gate
16 h 03 apart on the timetable
DL 514 leaves 16 h 03 after WN 2409 arrives on the timetable: more than half a day, so not a connection we count.