B6 1306 then DL 1574 at Boston
Nashville → Boston → Washington National
Timetable, Boston time
00:35B6 1306 from Nashville at the gate
10:45DL 1574 to Washington National leaves the gate
10 h 10 apart on the timetable
The last days
B6 1306 and DL 1574 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.