To visit Manokwari city, first you need to fly from your country to one of the major cities in Indonesia such as Jakarta, Surabaya, Denpasar, Makassar or Manado. After that take a domestic flight served by Batavia Air, Express Air, Merpati Air, Lion Air, or Sriwijaya Air to Manokwari. Check their respective websites for further information about the flight schedules and ticket prices.
If you are interested in taking a tour inside the tropical rainforest of Manokwari, please contact me (Charles Roring) via email at peace4wp@firstname.lastname@example.org
Also read: Rainforest of Arfak mountains - a nice birdwatching destination