AA 540 then FX 1388 at O'Hare
Nashville → Chicago → Memphis
Timetable, Chicago time
11:05AA 540 from Nashville at the gate
22:00FX 1388 to Memphis leaves the gate
10 h 55 apart on the timetable
The last days
AA 540 and FX 1388 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.