This is the 17891st most frequent Korean word.
송산공항
Songshan Airport.
송산공항 is used here as the subject of the sentence, referring to the airport as the place being described.
송산공항은 매우 혼잡합니다.
Songshan Airport is very crowded.
송산공항 is used here to denote the location from which the action (departure) will occur.
우리는 내일 송산공항에서 출발할 예정입니다.
We are scheduled to depart from Songshan Airport tomorrow.
송산공항 is employed to specify a landmark near which the hotel is located.