Soekarno-Hatta International Airport is a major hub airport that serves as a transit point from 364 indirect domestic flight routes and serves more than 48 million air passengers annually. To cope with the enormous demand, in 2014 the Indonesian government opened Halim Perdana Kusuma Airport for commercial services, which was previously the headquarters of the Indonesian Air Force Operations Command. The current capacity is no longer able to serve the current demand. Taking the existence of the closest non-commercial airports into consideration, this study aims to determine how much potential passenger sharing would be if a multi-airport system was implemented. The approach is carried out using Jovanovic's theory and Ministerial Regulation No. 39 of 2019. The results indicated the Pondok Cabe and Budiarto predicted to be able to accommodate the generation of air passengers in the Greater Jakarta areas are 21-55% and 19-51% respectively.
