Anak Krakatau Ash Grounds Jakarta Flights for Four Hours
Volcanic ash from Mount Anak Krakatau reached Soekarno-Hatta International Airport (CGK) in the early hours of Sunday, September 6, 2026, prompting Indonesian aviation authorities to shut the airport for four hours. The closure ran from 01:30 to 05:30 Western Indonesian Time, affecting travelers on some of the region's busiest international corridors.
What Triggered the Shutdown
The decision followed a "paper test" carried out between 00:35 and 01:05 WIB on September 6, which confirmed the physical presence of volcanic ash on airport surfaces. Indonesia's Directorate General of Civil Aviation (DGCA) issued NOTAM Number A3341/26 to formalize the closure. Director General of Civil Aviation Lukman F. Laisa stated that safety considerations drove every operational call made during the event.
Monitoring data compiled the previous evening, September 5 at 22:00 WIB, already counted 33 affected flights before the closure formally began.
Scope of the Disruptions
International services bore the heaviest impact. Sixteen international flights were cancelled outright, seven were delayed, and five were rescheduled. Routes connecting Jakarta with Singapore, Hong Kong, Sydney, Seoul/Incheon, Doha, Amsterdam, and Kuala Lumpur were all affected.
On the domestic side, four flights were cancelled and one was diverted. Services to and from Lampung, Denpasar, and Surabaya were among those touched by the disruption.
The DGCA flagged a concern that goes beyond the immediate closures: cascading effects on aircraft rotation, fleet positioning, and terminal capacity could continue to ripple through schedules throughout September 6 and potentially beyond.
What Authorities Are Watching Next
The DGCA said it would maintain intensive coordination with airlines, airport management, air navigation services, and Indonesia's meteorological and geophysical agency BMKG as Anak Krakatau's eruptive activity continues. Operational adjustments, officials noted, would be made dynamically as ground conditions evolve.
Passengers traveling through CGK were advised to check directly with their airlines for the latest flight status and to build extra time into their travel plans.
Why It Matters for Hosts
For guesthouses, boutique hotels, and villa operators in the Jakarta area, a sudden multi-hour airport closure is a direct source of no-shows, late arrivals, and last-minute booking changes. Keeping a simple, up-to-date cancellation and rebooking policy that explicitly references force-majeure events such as volcanic disruptions can reduce friction for both guests and staff. It is also worth establishing a routine of checking DGCA NOTAMs and BMKG volcanic-activity bulletins during periods of elevated Anak Krakatau activity, since ash events can recur with little warning. Proactive communication to incoming guests, sent as soon as a NOTAM is issued, builds trust and reduces the volume of anxious inquiries your team has to handle at short notice.
Details of the airport closure and flight disruption figures were first reported by Tempo.co, citing a statement from DGCA Director General Lukman F. Laisa and data provided by the Indonesian Ministry of Transportation.
First reported by en.tempo.co.