DL 1523 then DL 1768 at Boston
Washington National → Boston → Raleigh-Durham
Timetable, Boston time
13:34DL 1523 from Washington National at the gate
18:10DL 1768 to Raleigh-Durham leaves the gate
4 h 36 apart on the timetable
The last days
DL 1523 and DL 1768 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.