According to the latest assessment by OAG, a global provider of digital flight information, three of South Africa's international airports have received four-star rankings for On-Time Performance (OTP). The three airports are O. R. Tambo International Airport (JNB, 82.9% on-time performance) in Johannesburg, Cape Town International Airport (CPT, 84.4%) in Cape Town and King Shaka International Airport (DUR, 84.8%) in Durban. All three are operated by Airports Company South Africa (ACSA), the state-owned airport management company that operates South Africa's nine major airports.
OAG's On-time Performance (OTP) Star Ratings are measured across a rolling 12-month period. To achieve an OTP star rating, the world's airports must meet two simple criteria: all airports must have a minimum of 600 operations a month and OAG must receive flight status information for no less than 80 percent of scheduled flights within the 12-month period. The OTP star ratings range from one to five stars. Airports with the best on-time performance, for example, the top 10%, receive five stars.