You must arrive 3 hours before departure and pay a separate departure tax of 36 ANG. There will be 3 different queues for tax, immigrations and security. Also, you must be at the gate at least 30 minutes before departure.
10 AM - 5 PM (daily, except Saturday)
9 AM - 5 PM (Saturday)
011-599-546-7684, hours: 10 AM - 5 PM