F9 1447 then DL 9773 at San Francisco
Atlanta → San Francisco → New York JFK
Timetable, San Francisco time
20:50F9 1447 from Atlanta at the gate
06:30DL 9773 to New York JFK leaves the gate
9 h 40 apart on the timetable, overnight
The last days
F9 1447 and DL 9773 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.