UA 2129 then GW 4430 at Dulles
San Diego → Washington → Philadelphia
Timetable, Washington time
05:27UA 2129 from San Diego at the gate
13:52GW 4430 to Philadelphia leaves the gate
8 h 25 apart on the timetable
The last days
UA 2129 and GW 4430 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.