Korean Air Lines Co., Ltd., operating as Korean Air, is the flag carrier and largest airline of South Korea. Its global headquarters are located in Seoul. Korean Air's international passenger division and related subsidiary cargo division together serve 130 cities in 45 countries, while its domestic division serves 20 destinations. It is among the top 20 airlines in the world in terms of passengers carried, and is also top ranked in international freight carrying. Incheon International Airport serves as Korean Air's international hub. Korean Air also maintains a satellite headquarters campus at Incheon.