DL 1697 then DL 5692 at Boston
Phoenix → Boston → Washington National
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
07:35DL 5692 to Washington National leaves the gate
10 h 35 apart on the timetable, overnight
The last days
DL 1697 and DL 5692 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.