TP 4401 then AF 2404 at San Francisco
Boston → San Francisco → Seattle
Timetable, San Francisco time
09:59TP 4401 from Boston at the gate
10:38AF 2404 to Seattle leaves the gate
39 min apart on the timetable
The last days
TP 4401 and AF 2404 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.