South African Airways (SAA) is the national flag carrier of South Africa. It is one of the largest and most prominent airlines in Africa. SAA operates both domestic and international flights and is a member of the Star Alliance, which is the world's largest global airline alliance. The airline has its main hub at OR Tambo International Airport in Johannesburg. SAA offers a range of services including economy class, premium economy, business class, and first class on certain international routes.