DL 1909 then DL 1799 at JFK
Salt Lake City → New York → Raleigh-Durham
Timetable, New York time
05:00DL 1909 from Salt Lake City at the gate
12:59DL 1799 to Raleigh-Durham leaves the gate
7 h 59 apart on the timetable
The last days
DL 1909 and DL 1799 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.