AA 873 then AA 1349 at O'Hare
Atlanta → Chicago → Los Angeles
Timetable, Chicago time
13:18AA 873 from Atlanta at the gate
13:40AA 1349 to Los Angeles leaves the gate
22 min apart on the timetable
The last days
AA 873 and AA 1349 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.