Tân Sơn Nhất International Airport (IATA: SGN, ICAO: VVTS) (Vietnamese: Sân bay quốc tế Tân Sơn Nhất or Cảng hàng không quốc tế Tân Sơn Nhất) is the busiest airport in Vietnam with 32. 5 million passengers in 2016 and 38. 5 million passengers in 2018. It serves Ho Chi Minh City as well as the rest of southeastern Vietnam. As of January 2017, it had a total capacity of only 25 million passengers, which has caused constant congestion and sparked debate for expanding or building a new airport. The ... Tân Sơn Nhất International Airport (IATA: SGN, ICAO: VVTS) (Vietnamese: Sân bay quốc tế Tân Sơn Nhất or Cảng hàng không quốc tế Tân Sơn Nhất) is the busiest airport in Vietnam with 32. 5 million passengers in 2016 and 38. 5 million passengers in 2018. It serves Ho Chi Minh City as well as the rest of southeastern Vietnam. As of January 2017, it had a total capacity of only 25 million passengers, which has caused constant congestion and sparked debate for expanding or building a new airport. The airport's IATA code, SGN, is derived from the city's former name of Saigon.