Grenchen Airfield (ICAO: LSZG) is a small general aviation airport located in Grenchen, in the canton of Solothurn, Switzerland. It serves private pilots, flight training schools, and light aircraft operations rather than scheduled commercial airline traffic. The airfield is situated in the Swiss Mittelland, between the Jura mountains and the city of Biel/Bienne. It is well regarded as a training base and hosts a number of aviation clubs and flight schools. Grenchen also has historical ties to the Swiss watchmaking industry that defines the region. With a paved runway suitable for small to medium general aviation aircraft, Grenchen plays an important role in the regional aviation community, offering instrument approach procedures and year-round operations for private and business aviation.