AA 1489 then JL 5452 at San Francisco
Charlotte → San Francisco → Las Vegas
Timetable, San Francisco time
15:43AA 1489 from Charlotte at the gate
19:19JL 5452 to Las Vegas leaves the gate
3 h 36 apart on the timetable
The last days
AA 1489 and JL 5452 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.