CA 7253 then AF 2708 at San Francisco
Las Vegas → San Francisco → New York JFK
Timetable, San Francisco time
07:44CA 7253 from Las Vegas at the gate
11:45AF 2708 to New York JFK leaves the gate
4 h 01 apart on the timetable
The last days
CA 7253 and AF 2708 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.