DL 556 then B6 2918 at JFK
Santa Ana → New York → Boston
Timetable, New York time
06:00DL 556 from Santa Ana at the gate
08:00B6 2918 to Boston leaves the gate
2 h apart on the timetable
The last days
DL 556 and B6 2918 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.