AA 9915 then DL 2123 at Phoenix
Salt Lake City → Phoenix → Atlanta
Timetable, Phoenix time
10:40AA 9915 from Salt Lake City at the gate
13:43DL 2123 to Atlanta leaves the gate
3 h 03 apart on the timetable
The last days
AA 9915 and DL 2123 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.