AA 4013 then AA 1387 at O'Hare
Asheville → Chicago → Denver
Timetable, Chicago time
10:35AA 4013 from Asheville at the gate
21:05AA 1387 to Denver leaves the gate
10 h 30 apart on the timetable
The last days
AA 4013 and AA 1387 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.