B6 633 then UA 3919 at San Francisco
Boston → San Francisco → Denver
Timetable, San Francisco time
09:59B6 633 from Boston at the gate
14:00UA 3919 to Denver leaves the gate
4 h 01 apart on the timetable
Today
From the airport’s board at 11:51 San Francisco time
09:26B6 633 reached the gate33 min early
14:00UA 3919 due to leave, no estimate yet
4 h 34 between the gates, on these times
The last days
B6 633 and UA 3919 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.