UA 3914 then AS 580 at San Francisco
Manila → San Francisco → Seattle
Timetable, San Francisco time
09:36UA 3914 from Manila at the gate
10:39AS 580 to Seattle leaves the gatealso FI 7656
1 h 03 apart on the timetable
The last days
UA 3914 and AS 580 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.