Grant County Airport is a county-owned, public-use airport in Grant County, New Mexico, United States. It is located 10 nautical miles southeast of the central business district of Silver City, New Mexico. The airport is mostly used for general aviation, but is also served by one commercial airline. Service is subsidized by the Essential Air Service …Grant County Airport is a county-owned, public-use airport in Grant County, New Mexico, United States. It is located 10 nautical miles southeast of the central business district of Silver City, New Mexico. The airport is mostly used for general aviation, but is also served by one commercial airline. Service is subsidized by the Essential Air Service program.