The best price found from United States to Sulawesi is on August 15th, 2016, travelling with Singapore Airlines. See more options, compare prices and book: search flights.
Silk Air flies between Manado and Singapore four days per week for around US$210 (one way). Air Asia flies from Makassar to Kuala Lumpur from US$80.
The two main transport hubs are Makassar and Manado, which are well connected with the rest of Indonesia. Palu is the third most important airport. In recent years Gorontalo, Luwuk, Poso and Kendari have all seen an increase in air traffic; minor airports at towns such as Ampana, Selayar and Naha (Sangihe-Talaud Islands) also provide useful links for travellers.
There are direct flights to Java, Bali, Kalimantan, Maluku and Papua. Lion Air, Garuda Indonesia, Wings Air, Batik Air, Citilink, XpressAir, Sriwijaya Air are the main carriers.