DL 420 then DL 363 at San Francisco
Santa Ana → San Francisco → New York JFK
Timetable, San Francisco time
09:56DL 420 from Santa Ana at the gate
16:00DL 363 to New York JFK leaves the gatealso VS 3215
6 h 04 apart on the timetable
The last days
DL 420 and DL 363 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.