UA 1572 then WN 3526 at Phoenix
Denver → Phoenix → St Louis
Timetable, Phoenix time
11:44UA 1572 from Denver at the gate
11:20WN 3526 to St Louis leaves the gate
23 h 36 apart on the timetable, overnight
WN 3526 leaves 23 h 36 after UA 1572 arrives on the timetable: more than half a day, so not a connection we count.