AF 8992 then UA 5887 at Seattle
Amsterdam → Seattle → San Francisco
Timetable, Seattle time
12:47AF 8992 from Amsterdam at the gate
17:23UA 5887 to San Francisco leaves the gate
4 h 36 apart on the timetable
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
AF 8992 and UA 5887 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.