Silent Skies Act of 1999

Silent Skies Act of 1999 - Directs the Secretary of Transportation to issue regulations to ensure that: (1) 50 percent of the civil turbojets with a maximum weight of more than 75,000 pounds operating after December 31, 2006 (and 100 percent of such turbojets operating after December 31, 2011) in the United States comply with Federal stage 4 noise levels standards; and (2) air carriers, in purchasing and using civil turbojets that comply with such standards, give priority to using them for air transportation to or from high density airports. Requires each air carrier to report annually to the Secretary (and the Secretary to Congress) on progress the carrier is making toward complying with the requirements of this Act. Requires such aircraft that are imported after a specified date into a noncontiguous State or U.S. territory and that are used to provide transportation in the 48 contiguous States to comply with stage 4 noise levels.