EK 9987 then K4 532 at O'Hare
Liege → Chicago → Seoul
Timetable, Chicago time
10:25EK 9987 from Liege at the gate
12:15K4 532 to Seoul leaves the gate
1 h 50 apart on the timetable
The last days
EK 9987 and K4 532 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.