WN 8500 then AA 2524 at San Francisco
Phoenix → San Francisco → Chicago O'Hare
Timetable, San Francisco time
09:00WN 8500 from Phoenix at the gate
15:04AA 2524 to Chicago O'Hare leaves the gatealso QF 4550, FJ 5015
6 h 04 apart on the timetable
The last days
WN 8500 and AA 2524 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.