AA 5310 then AA 595 at Philadelphia
Grand Rapids → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
08:55AA 5310 from Grand Rapids at the gate
09:22AA 595 to Chicago O'Hare leaves the gate
27 min apart on the timetable
The last days
AA 5310 and AA 595 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.