Blue Grass Airport (IATA: LEX, ICAO: KLEX, FAA LID: LEX) is a public airport in Fayette County, Kentucky, 4 miles west of Lexington. The main terminal building was opened in 1977. The airport covers 911 acres (3.69 km²) and has two runways. It is home to the Aviation Museum of Kentucky. On April 18, 2007, Blue Grass Airport opened an extension of Concourse B, adding six boarding gates with 4 new jetways.