WN 4187 then WN 4837 at Phoenix
St Louis → Phoenix → Boise
Timetable, Phoenix time
14:35WN 4187 from St Louis at the gate
13:05WN 4837 to Boise leaves the gate
22 h 30 apart on the timetable, overnight
WN 4837 leaves 22 h 30 after WN 4187 arrives on the timetable: more than half a day, so not a connection we count.