AA 540 then AA 4459 at O'Hare
Nashville → Chicago → Memphis
Timetable, Chicago time
11:05AA 540 from Nashville at the gate
21:09AA 4459 to Memphis leaves the gate
10 h 04 apart on the timetable
The last days
AA 540 and AA 4459 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.