AA 1681 then AA 533 at Miami
Knoxville → Miami → Philadelphia
Timetable, Miami time
08:16AA 1681 from Knoxville at the gate
09:05AA 533 to Philadelphia leaves the gate
49 min apart on the timetable
The last days
AA 1681 and AA 533 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.