UA 641 then SY 8188 at Dulles
Atlanta (ATL) → Washington → Detroit
Timetable, Washington time
07:18UA 641 from Atlanta (ATL) at the gate
16:19SY 8188 to Detroit leaves the gate
9 h 01 apart on the timetable
The last days
UA 641 and SY 8188 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.