DL 9889 then DL 5695 at Boston
West Palm Beach → Boston → Washington National
Timetable, Boston time
20:30DL 9889 from West Palm Beach at the gate
07:40DL 5695 to Washington National leaves the gate
11 h 10 apart on the timetable, overnight
The last days
DL 9889 and DL 5695 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.