UA 822 then AS 9921 at San Francisco
Mexico City → San Francisco → Honolulu
Timetable, San Francisco time
08:44UA 822 from Mexico City at the gatealso AC 5403, NH 7369, NZ 9822
17:00AS 9921 to Honolulu leaves the gate
8 h 16 apart on the timetable
The last days
UA 822 and AS 9921 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.