This is the 5301st most frequent Korean word.
대한항공이
"대한항공이" means "Korean Air" (subject marker included).
In this sentence, "대한항공이" is the subject indicating Korean Air airline performing the action.
대한항공이 뉴욕으로 가는 직항편을 운영합니다.
Korean Air operates a direct flight to New York.
Here, "대한항공이" describes the subject, Korean Air, and an opinion about its convenience.
이번 여행에는 대한항공이 아주 편리했어요.
Korean Air was very convenient for this trip.
In this example, "대한항공이" identifies Korean Air as the entity responsible for canceling the flight, performing the action of the verb.