Charleston International Airport (IATA: CHS, ICAO: KCHS) is an airport located 9 miles (14 km) northwest of the city of Charleston in Charleston County, South Carolina, USA. The airport has two runways which it shares with Charleston Air Force Base. It is South Carolina's busiest airport with 106 flights or more daily. It is estimated that 4,000 people go through the airport on an average day and 6,000 during the holiday season.

All passengers check in at the main terminal, but flights depart from 2 different concourses which are together part of the same building.