AA 4996 then UA 453 at Phoenix
Grand Junction → Phoenix → San Diego
Timetable, Phoenix time
12:54AA 4996 from Grand Junction at the gate
16:37UA 453 to San Diego leaves the gate
3 h 43 apart on the timetable
The last days
AA 4996 and UA 453 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.