Are there nonstop flights from Kolaka (KXB) to Makassar (UPG)?

Yes. Wings Air, Sriwijaya Air fly this route. Flight time is about 46m.

Kolaka → Makassar

Sangia Nibandera Airport (KXB) to Sultan Hasanuddin International Airport (UPG)・233 km

Nonstop flights available (2 airlines). Flight time about 46m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.