For domestic flights (within Curaçao) each passenger must present a valid Passport.
Citizens of Aruba, Bonaire, Curaçao, Saba, St. Eustatius, St. Maarten & The Netherlands may also travel with a valid National ID Card.
When flying domestically from the Curaçao International Airport, each passenger must proceed through immigration.
Unfortunately airport immigration only recognizes national ID cards issued by Bonaire, Curaçao, Saba, St. Eustatius & St. Maarten. As such nationals of Aruba & the Netherlands must show a valid passport.