Addison Airport (IATA: ADS, ICAO: KADS, FAA LID: ADS) is a public airport in Addison, in Dallas County, Texas, United States, 9 mi (7.8 nmi; 14 km) north of downtown Dallas. It opened in 1954 and was purchased by the town of Addison in 1976. It is home to the Cavanaugh Flight Museum. The Addison Airport Toll Tunnel, completed in 1999, allows east–west automobile traffic to cross the airport under the runway.