Volcanic ash from Mount Anak Krakatau forces temporary closure of Soekarno-Hatta Airport

Volcanic ash from Mount Anak Krakatau prompted Indonesia to close Soekarno-Hatta International Airport for four hours, disrupting 33 flights on September 6, 2026.

The Directorate General of Civil Aviation said the closure, issued under NOTAM A3341/26, ran from 1:30 a.m. to 5:30 a.m. Western Indonesian Time. Director General of Civil Aviation Lukman F. Laisa said paper tests conducted between 12:35 a.m. and 1:05 a.m. indicated volcanic ash at the airport.

International services recorded 16 cancellations, seven delays and five reschedulings. Affected routes included Singapore, Hong Kong, Sydney, Seoul and Incheon, Doha, Amsterdam and Kuala Lumpur. Domestic operations saw four cancellations and one diversion, affecting flights involving Lampung, Denpasar and Surabaya.

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Safety remains the top priority in every operational decision, including flight schedule adjustments made by airlines.

The aviation authority warned that the disruption could have cascading effects on aircraft rotations, fleet availability, later flight schedules and terminal capacity. It said it was paying particular attention to the recovery of schedules on September 6.

“Safety remains the top priority in every operational decision, including flight schedule adjustments made by airlines,” Lukman said. “Operational adjustments will continue to be made dynamically based on evolving conditions on the ground.” Authorities said they would coordinate with airlines, airport management, air navigation services and Indonesia's meteorological agency, BMKG, and advised passengers to check directly with airlines for the latest flight information.

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Operational adjustments will continue to be made dynamically based on evolving conditions on the ground.