AA 1998 then WN 900 at Phoenix
Seattle → Phoenix → San Diego
Timetable, Phoenix time
10:24AA 1998 from Seattle at the gate
21:15WN 900 to San Diego leaves the gate
10 h 51 apart on the timetable
The last days
AA 1998 and WN 900 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.