IB 8548 then AS 9790 at San Francisco
Miami → San Francisco → Seattle
Timetable, San Francisco time
00:12IB 8548 from Miami at the gate
09:00AS 9790 to Seattle leaves the gate
8 h 48 apart on the timetable
The last days
IB 8548 and AS 9790 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.