AA 3344 then AA 1848 at O'Hare
Appleton → Chicago → Philadelphia
Timetable, Chicago time
12:48AA 3344 from Appleton at the gate
16:50AA 1848 to Philadelphia leaves the gate
4 h 02 apart on the timetable
The last days
AA 3344 and AA 1848 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.