TP 4399 then WN 2906 at San Francisco
Boston → San Francisco → Denver
Timetable, San Francisco time
00:25TP 4399 from Boston at the gate
10:40WN 2906 to Denver leaves the gate
10 h 15 apart on the timetable
The last days
TP 4399 and WN 2906 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.