Flugplatz Sonnen is a private airfield near the village of Sonnen in Lower Bavaria, about 20 km northeast of Passau. It has a single runway (02/20, 650 m, grass with asphalt strip) and sits around 820–824 m above sea level. The airfield offers flight-training services, sightseeing flights, and hosts two flight schools. There’s also a guesthouse with a terrace for visitors, hangars for storage, and aircraft parking — making it a local hub for general aviation and recreational flying.