This is the 9535th most frequent Korean word.
경유해
"경유해" means "via" or "passing through."
In this sentence, "경유해" is used to express passing through Seoul as an intermediary destination before reaching the final destination, Busan.
우리는 서울을 경유해 부산으로 향합니다.
We pass through Seoul to head to Busan.
Here, "경유해" indicates that the flight stops at Incheon as a connecting point on the route to the United States.
항공편이 인천을 경유해 미국으로 갑니다.
The flight goes to the United States via Incheon.
In this sentence, "경유해" implies stopping or passing through several main cities on the way to reaching the endpoint.