AA 9923 then AA 2123 at LAX
Tucson → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
13:02AA 9923 from Tucson at the gate
13:41AA 2123 to Chicago O'Hare leaves the gate
39 min apart on the timetable
The last days
AA 9923 and AA 2123 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.