AA 1275 then AA 3501 at O'Hare
Newark → Chicago → Knoxville
Timetable, Chicago time
07:28AA 1275 from Newark at the gate
13:31AA 3501 to Knoxville leaves the gate
6 h 03 apart on the timetable
The last days
AA 1275 and AA 3501 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.