TP 4399 then BA 5599 at San Francisco
Boston → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
20:55TP 4399 from Boston at the gate
06:38BA 5599 to Dallas-Fort Worth leaves the gate
9 h 43 apart on the timetable, overnight
The last days
TP 4399 and BA 5599 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.