AA 644 then K4 538 at O'Hare
Pittsburgh → Chicago → Seoul
Timetable, Chicago time
06:32AA 644 from Pittsburgh at the gate
15:00K4 538 to Seoul leaves the gate
8 h 28 apart on the timetable
The last days
AA 644 and K4 538 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.