DL 551 then DL 939 at LAX
Salt Lake City → Los Angeles → New York JFK
Timetable, Los Angeles time
06:47DL 551 from Salt Lake City at the gate
12:45DL 939 to New York JFK leaves the gate
5 h 58 apart on the timetable
The last days
DL 551 and DL 939 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.