CA 985 then Y4 2735 at San Francisco
Beijing → San Francisco → Las Vegas
Timetable, San Francisco time
09:30CA 985 from Beijing at the gate
11:06Y4 2735 to Las Vegas leaves the gatealso F9 4158
1 h 36 apart on the timetable
The last days
CA 985 and Y4 2735 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.