B6 8378 then B6 833 at Boston
Las Vegas → Boston → San Francisco
Timetable, Boston time
09:19B6 8378 from Las Vegas at the gate
17:05B6 833 to San Francisco leaves the gate
7 h 46 apart on the timetable
The last days
B6 8378 and B6 833 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.