AA 6284 then AS 1478 at O'Hare
Des Moines → Chicago → San Diego
Timetable, Chicago time
11:10AA 6284 from Des Moines at the gate
19:49AS 1478 to San Diego leaves the gate
8 h 39 apart on the timetable
The last days
AA 6284 and AS 1478 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.