DL 1909 then VX 4 at JFK
Salt Lake City → New York → San Francisco
Timetable, New York time
05:00DL 1909 from Salt Lake City at the gate
08:05VX 4 to San Francisco leaves the gate
3 h 05 apart on the timetable
The last days
DL 1909 and VX 4 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.