AA 6457 then AA 990 at Phoenix
Tucson → Phoenix → Chicago O'Hare
Timetable, Phoenix time
21:26AA 6457 from Tucson at the gate
07:03AA 990 to Chicago O'Hare leaves the gate
9 h 37 apart on the timetable, overnight
The last days
AA 6457 and AA 990 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.