AA 7516 then UA 5489 at San Francisco
Palm Springs → San Francisco → Arcata
Timetable, San Francisco time
12:32AA 7516 from Palm Springs at the gate
19:10UA 5489 to Arcata leaves the gate
6 h 38 apart on the timetable
The last days
AA 7516 and UA 5489 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.