B6 2918 then DL 2889 at Boston
New York JFK → Boston → Seattle
Timetable, Boston time
09:20B6 2918 from New York JFK at the gate
15:45DL 2889 to Seattle leaves the gate
6 h 25 apart on the timetable
The last days
B6 2918 and DL 2889 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.