AA 2489 then AA 1466 at O'Hare
Baltimore → Chicago → Denver
Timetable, Chicago time
08:45AA 2489 from Baltimore at the gate
15:23AA 1466 to Denver leaves the gate
6 h 38 apart on the timetable
The last days
AA 2489 and AA 1466 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.