Sultan Abdul Aziz Shah International Airport — Subang, Malaysia

Before Kuala Lumpur International Airport opened in 1998, SZB served as Malaysia's principal gateway, and the older airport at Subang still carries the name of a former Sultan of Selangor who once reigned over the surrounding state. Since losing its status as the main international hub, Subang has settled into a role hosting regional carrier Firefly, general aviation, corporate jets, and a busy flight-training and maintenance sector that benefits from the airport's shorter distance to central Kuala Lumpur compared with KLIA. The facility also houses a Royal Malaysian Air Force base and supports general aviation activity tied to the country's wider aviation industry. Turboprop and regional jet services connect Subang to destinations across Peninsular Malaysia and nearby Sumatra, filling a niche for travelers who prioritize convenience over the longer routes typically handled at KLIA. Its proximity to the capital keeps it relevant despite decades of reduced prominence.