AA 1277 then AS 3155 at Denver
Chicago O'Hare → Denver → San Diego
Timetable, Denver time
13:47AA 1277 from Chicago O'Hare at the gate
19:59AS 3155 to San Diego leaves the gate
6 h 12 apart on the timetable
The last days
AA 1277 and AS 3155 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.