AA 2407 then AS 776 at San Francisco
Philadelphia → San Francisco → Las Vegas
Timetable, San Francisco time
11:35AA 2407 from Philadelphia at the gate
13:47AS 776 to Las Vegas leaves the gatealso DE 5109, AA 7518, BA 7559, CX 7856
2 h 12 apart on the timetable
The last days
AA 2407 and AS 776 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.