Hong Kong International Airport (IATA: HKG, ICAO: VHHH) is Hong Kong's main airport, built on reclaimed land on the island of Chek Lap Kok. The airport is also referred to as Chek Lap Kok International Airport or Chek Lap Kok Airport, to distinguish it from its predecessor, the former Kai Tak Airport.

Having been in commercial operation since 1998, Hong Kong International Airport is one of the largest trans-shipment centres, passenger hubs and gateways for destinations in China and Asia. The airport is the world's busiest cargo gateway and one of the world's busiest passenger airports. It is also home to one of the world's largest passenger terminal buildings (the largest when opened in 1998).

The airport is operated by the Airport Authority 24 hours a day and is the primary hub for Cathay Pacific (the flag carrier of Hong Kong), Hong Kong Airlines, HK Express and Air Hong Kong (cargo carrier). The airport is one of the hubs of Oneworld alliance, and also one of the Asia-Pacific cargo hubs for UPS Airlines. It is a focus city for many airlines, including China Airlines and China Eastern Airlines. Singapore Airlines and Ethiopian Airlines both utilise Hong Kong as a stopover point for their flights.

HKIA is an important contributor to Hong Kong's economy, with approximately 65,000 employees. More than 100 airlines operate flights from the airport to over 180 cities across the globe. In 2015, HKIA handled 68.5 million passengers, making it the 8th busiest airport worldwide by passenger traffic and the 4th busiest airport worldwide by international passenger traffic. Since 2010, it has also surpassed Memphis International Airport to become the world's busiest airport by cargo traffic.The airport is managed and operated by the Airport Authority Hong Kong (AA), which was established on 1 December 1995.Since 2019, to facilitate the increased traffic due to the third runway, Terminal 2 has been undergoing redevelopment and will not reopen until at least 2024.