B6 993 then WN 1726 at Denver
Boston → Denver → Oakland
Timetable, Denver time
13:07B6 993 from Boston at the gate
19:35WN 1726 to Oakland leaves the gate
6 h 28 apart on the timetable
The last days
B6 993 and WN 1726 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.