Explore details about location Flachau. Flachau is a location situated within the Sankt Johann im Pongau alongside other areas such as Radstadt, Kleinarl, Sankt Veit im Pongau. Additionally, some smaller parts of Flachau include specific areas like Kohlmaisgasse, Kaltenstein-Hafeichtenalmweg, Kohlmaisgasse adding to the diversity of its landscape.