AA 3172 then AA 2121 at Phoenix
Chicago O'Hare → Phoenix → Reno
Timetable, Phoenix time
09:45AA 3172 from Chicago O'Hare at the gate
08:16AA 2121 to Reno leaves the gate
22 h 31 apart on the timetable, overnight
AA 2121 leaves 22 h 31 after AA 3172 arrives on the timetable: more than half a day, so not a connection we count.