WN 3978 then DL 2444 at Phoenix
Salt Lake City → Phoenix → Seattle
Timetable, Phoenix time
06:45WN 3978 from Salt Lake City at the gate
06:00DL 2444 to Seattle leaves the gate
23 h 15 apart on the timetable, overnight
DL 2444 leaves 23 h 15 after WN 3978 arrives on the timetable: more than half a day, so not a connection we count.