The airport has its own 18-hole golf course. You can play all day Mondays to Thursdays, and before 11:00 on Fridays for US$60; Sundays after 11:00 for US$100.
Guide text adapted from the Wikivoyage article "Soekarno-Hatta International Airport" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0