Are there nonstop flights from Feldkirchen bei Graz (GRZ) to Salzburg (SZG)?

Yes. Eurowings fly this route. Flight time is about 44m.

Feldkirchen bei Graz → Salzburg

Graz Airport (GRZ) to Salzburg Airport (SZG)・204 km

Nonstop flights available (1 airline). Flight time about 44m. Nonstop return flights also operate.

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