AA 9909 then WN 2124 at Phoenix
Salt Lake City → Phoenix → Denver
Timetable, Phoenix time
14:30AA 9909 from Salt Lake City at the gate
09:55WN 2124 to Denver leaves the gate
19 h 25 apart on the timetable, overnight
WN 2124 leaves 19 h 25 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.