S9 999 then UA 8128 at Dulles
Philadelphia → Washington → Seattle
Timetable, Washington time
12:32S9 999 from Philadelphia at the gate
17:50UA 8128 to Seattle leaves the gate
5 h 18 apart on the timetable
The last days
S9 999 and UA 8128 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.
Later flights to Seattle
No later flight to Seattle on the timetable.