Meridian Regional Airport is a joint civil-military public use airport located at Key Field, a joint use public/military airfield. It is located 3 nautical miles southwest of Meridian, a city in Lauderdale County, Mississippi, United States. The airport is owned by the Meridian Airport Authority. At 10,003 feet, Key Field is home to the longest public use runway in Mississipp…Meridian Regional Airport is a joint civil-military public use airport located at Key Field, a joint use public/military airfield. It is located 3 nautical miles southwest of Meridian, a city in Lauderdale County, Mississippi, United States. The airport is owned by the Meridian Airport Authority. At 10,003 feet, Key Field is home to the longest public use runway in Mississippi. It is mostly used for general aviation and military traffic, but it also served by one commercial airline with scheduled passenger service subsidized by the Essential Air Service program.