DL 8839 then AA 1829 at Phoenix
Calgary → Phoenix → San Diego
Timetable, Phoenix time
09:55DL 8839 from Calgary at the gate
20:00AA 1829 to San Diego leaves the gate
10 h 05 apart on the timetable
The last days
DL 8839 and AA 1829 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.