AA 9909 then WN 3530 at Phoenix
Salt Lake City → Phoenix → Chicago Midway
Timetable, Phoenix time
14:30AA 9909 from Salt Lake City at the gate
12:15WN 3530 to Chicago Midway leaves the gate
21 h 45 apart on the timetable, overnight
WN 3530 leaves 21 h 45 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.