Rheintalflug era una pequeña compañía regional austriaca que volaba desde el no menos pequeño aeropuerto de Altenrhein /St Gallen principalmente (
Rheintalflug was a small Austrian airline headquartered at the even smaller Altenrhein /St Gallen airport (
which no longer has scheduled destinations) with flights to Vienna. In the late 90's the airline codeshared with Lufthansa and flew some regional flights for them, but they later got merged with Austrian Airlines, which eventually led to the airline folding down...
Rheintalflug en luftfahrt.ch : artículo (en alemán) sobre la empresa. A German language article about this airline.