AA 595 then AA 1476 at O'Hare
Philadelphia → Chicago → Seattle (SEA)
Timetable, Chicago time
11:04AA 595 from Philadelphia at the gate
11:34AA 1476 to Seattle (SEA) leaves the gate
30 min apart on the timetable
The last days
AA 595 and AA 1476 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.