Kota Kinabalu International Airport (KKIA) (IATA: BKI, ICAO: WBKK) is an international airport in Kota Kinabalu, the state capital of Sabah, Malaysia, approximately 8 km (5.0 mi) southwest of the city centre. In 2023, the airport handled over 7 million passengers passengers, making it the second busiest airport in Malaysia after Kuala Lumpur International Airport in terms of both passenger and aircraft movements, though the number fell short of its peak in 2019, when it recorded over 9 million passengers passengers. It is also the third busiest in Malaysia for cargo.

As the primary gateway to East Malaysia, KKIA serves as the main hub for MASwings and a secondary hub for Firefly and Malaysia Airlines. Additionally, it is the second largest hub for AirAsia Malaysia, after KLIA2.