Bandaranaike International Airport (BIA) (Sinhala: බණ්ඩාරනායක ජාත්‍යන්තර ගුවන්තොටුපළ, romanized: Bandāranāyaka Jātyantara Guvantoṭupaḷa; Tamil: பண்டாரநாயக்க சர்வதேச விமான நிலையம், romanized: Paṇṭāranāyakka Carvatēca Vimāṉa Nilaiyam) (commonly known as Colombo International Airport, Colombo–Bandaranaike International Airport, and locally as Katunayake International Airport) (IATA: CMB, ICAO: VCBI) is the main international airport in Sri Lanka. It is named after former Prime Minister S. W. R. D. Bandaranaike (1899–1959) and is in the suburb of Negombo, 32.5 kilometres (20+1⁄4 miles) north of the nation's capital and commercial center, Colombo.

It is administered by Airport and Aviation Services (Sri Lanka) Ltd and serves as the hub of SriLankan Airlines, the national carrier of Sri Lanka, Fitsair, a privately owned low-cost carrier, and domestic carrier Cinnamon Air.