Beijing Capital International Airport (pinyin: Beijing Shoudu Guójì Jicháng) (IATA: PEK, ICAO: ZBAA) is the main international airport that serves the capital city of Beijing, People's Republic of China. The IATA Airport Code is PEK, reflecting Beijing's former Romanization Peking. The code BJS is also frequently used, reflecting the current pinyin spelling of Beijing and including all airports in the Beijing metropolitan area; currently, Beijing Capital (PEK) is the only civil aviation airport that falls under BJS. Entering either code will get a passenger to the same airport.

Beijing Capital has rapidly ascended in rankings of the world's busiest airports in the past decade. It had become the busiest airport in Asia in terms of passenger traffic and total traffic movements by 2009. Beijing Capital International Airport is also the 3rd busiest airport in the world with 65,329,851 passengers passing through the airport in 2009.