AA 3598 then AA 2579 at DFW
Houston → Dallas-Fort Worth → Denver
Timetable, Dallas-Fort Worth time
10:23AA 3598 from Houston at the gate
11:11AA 2579 to Denver leaves the gate
48 min apart on the timetable
The last days
AA 3598 and AA 2579 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.