AA 3171 then UA 1245 at O'Hare
Phoenix → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
09:31AA 3171 from Phoenix at the gate
21:35UA 1245 to Cincinnati Northern Kentucky leaves the gate
12 h 04 apart on the timetable
UA 1245 leaves 12 h 04 after AA 3171 arrives on the timetable: more than half a day, so not a connection we count.