Den Besten Aviation LLC, 1010 N Riverview Rd, Canton, SD 57013, US

Landmark Aviation is a more than 45-year old locally owned company, employing approximately 160 people in the Sioux Falls and Rapid City, S.D., areas. A 24-hour, full-service fixed-base operation, Landmark Aviation offers general aviation services, including aircraft fueling and hangar services, ground services, aircraft maintenance, avionics, aircraft sales and aircraft parts sales. The firm offers flight training at Landmark Aviation School of Aeronautics, air cargo and charter services. Headquartered in Sioux Falls, S.D., Landmark Aviation Services caters to owners and operators flying private, corporate and government-owned aircraft.