Direct flights to Austria:

Sofia to Vienna

Flights Sofia to Austria with 1 stopover:

Flights via London Heathrow (LHR), London, United Kingdom
From Sofia (SOF), Bulgaria with Aerosvit Changing at Boryspil, KBP, Kiev, Ukraine Then on to Vienna (VIE), Austria with Ukraine International Airlines
Flights via Larnaca (LCA), Cyprus
From Sofia (SOF), Bulgaria with Cyprus Airways Transfer at Larnaca (LCA), Cyprus Then on to Thalerhof Airport (GRZ), Graz, Austria with Eurocypria Airlines
OR
Then on to Salzburg (SZG), Salzburg, Austria with Eurocypria Airlines
OR
Then on to Vienna (VIE), Vienna, Austria with Cyprus Airways
Flights via London Heathrow (LHR), London, United Kingdom
From Sofia (SOF), Bulgaria with British Airways Transfer at London Heathrow (LHR) Then on to Vienna (VIE), Austria with British Airways
OR
Then on to Vienna (VIE), Austria with British Midland
OR
Then on to Vienna (VIE), Austria with SN Brussels Airlines
Flights via Central Airport (ODS), Odessa, Ukraine
From Sofia (SOF), Bulgaria with Aerosvit Transfer at Central Airport (ODS), Odessa, Ukraine Then on to Vienna (VIE), Austria with Ukraine International Airlines
Flights via Moscow Sheremetievo (SVO), Russia
From Sofia (SOF), Bulgaria with Aeroflot
OR
From Sofia (SOF), Bulgaria with Aerosvit
Transfer at Moscow Sheremetievo (SVO), Russia Then on to Klagenfurt Airport (KLU), Austria with Aeroflot
Flights via BenGurion International (TLV), Tel Aviv Yafo, Israel
From Sofia (SOF), Bulgaria with Aerosvit
OR
From Sofia (SOF), Sofia, Bulgaria with El-Al Israel Airlines
Transfer at BenGurion International (TLV), Tel Aviv Yafo, Israel Then on to Vienna (VIE), Austria with El-Al Israel Airlines
OR
Then on to Vienna (VIE), Austria with SN Brussels Airlines