Are there nonstop flights from Poso-Celebes Island (PSJ) to Palu (PLW)?

Yes. Susi Air fly this route. Flight time is about 37m.

Poso-Celebes Island → Palu

Kasiguncu Airport (PSJ) to Mutiara - SIS Al-Jufrie Airport (PLW)・100 km

Nonstop flights available (1 airline). Flight time about 37m. Nonstop return flights also operate.

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