mainly Jet A-1 and Jet A. The latter has a higher freezing point (minimum –40°C instead of minimum –47°C) and is available only in the U.S.A. Major Civil Jet Fuel grades Jet A-1 Jet A-1 is a kerosine grade of fuel suitable for most turbine engined aircraft. It has a flash point minimum of 38°C (100°F) and a freeze point minimum of –47°C.