AA 4455 then DL 2889 at Boston
Washington National → Boston → Seattle
Timetable, Boston time
08:26AA 4455 from Washington National at the gate
15:47DL 2889 to Seattle leaves the gate
7 h 21 apart on the timetable
The last days
AA 4455 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.