WN 3980 then DL 1697 at Phoenix
Salt Lake City → Phoenix → Boston
Timetable, Phoenix time
22:30WN 3980 from Salt Lake City at the gate
14:20DL 1697 to Boston leaves the gate
15 h 50 apart on the timetable, overnight
DL 1697 leaves 15 h 50 after WN 3980 arrives on the timetable: more than half a day, so not a connection we count.