AA 4040 then DL 901 at Phoenix
Denver → Phoenix → Atlanta
Timetable, Phoenix time
07:07AA 4040 from Denver at the gate
08:05DL 901 to Atlanta leaves the gate
58 min apart on the timetable
The last days
AA 4040 and DL 901 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.