DL 5699 then DL 353 at JFK
Washington National → New York → Los Angeles
Timetable, New York time
12:30DL 5699 from Washington National at the gate
18:00DL 353 to Los Angeles leaves the gate
5 h 30 apart on the timetable
The last days
DL 5699 and DL 353 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.