AA 4523 then FX 1380 at O'Hare
Baltimore → Chicago → Memphis
Timetable, Chicago time
20:00AA 4523 from Baltimore at the gate
21:30FX 1380 to Memphis leaves the gate
1 h 30 apart on the timetable
The last days
AA 4523 and FX 1380 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.