CA 818 then KE 852 at Beijing
Washington → Beijing → Seoul Incheon
Timetable, Beijing time
03:55CA 818 from Washington at the gate
18:55KE 852 to Seoul Incheon leaves the gate
15 h apart on the timetable
KE 852 leaves 15 h after CA 818 arrives on the timetable: more than half a day, so not a connection we count.