B6 1534 then WN 492 at Boston
San Francisco → Boston → Denver
Timetable, Boston time
06:44B6 1534 from San Francisco at the gate
13:10WN 492 to Denver leaves the gate
6 h 26 apart on the timetable
The last days
B6 1534 and WN 492 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.