Are there nonstop flights from Ishigaki (ISG) to Yonaguni (OGN)?

Yes. Ryukyu Air Commuter fly this route. Flight time is about 39m.

Ishigaki → Yonaguni

New Ishigaki Airport (ISG) to Yonaguni Airport (OGN)・128 km

Nonstop flights available (1 airline). Flight time about 39m. Nonstop return flights also operate.

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