DL 514 then AA 2689 at Phoenix
Boston → Phoenix → San Diego
Timetable, Phoenix time
12:27DL 514 from Boston at the gate
21:20AA 2689 to San Diego leaves the gate
8 h 53 apart on the timetable
The last days
DL 514 and AA 2689 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.