Are there nonstop flights from Batam (BTH) to Siborong-Borong (DTB)?

Yes. Super Air Jet, Citilink fly this route. Flight time is about 1h 11m.

Batam → Siborong-Borong

Hang Nadim International Airport (BTH) to Silangit Airport (DTB)・584 km

Nonstop flights available (2 airlines). Flight time about 1h 11m. Nonstop return flights also operate.

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