Jakarta’s Soekarno-Hatta shuts as Anak Krakatau ash spreads

Jakarta’s Soekarno-Hatta International Airport was temporarily closed on Sunday after volcanic ash from the ongoing eruption of Mount Anak Krakatau was detected in the airport’s airspace, disrupting hundreds of flights and leaving tens of thousands of passengers facing delays and cancellations across Indonesia.

Temporary shutdown as ash triggers safety protocols

Flight operations at Soekarno-Hatta International Airport were suspended in stages from the early hours of Sunday, September 6, after aviation notices reported volcanic ash in the vicinity of the airport, located west of Jakarta. Notices to Airmen (NOTAMs) issued by AirNav Indonesia initially ordered a closure from 1:30 a.m. to 5:30 a.m. local time and were later extended as monitoring continued to show ash in the airspace.

According to publicly available information from Indonesia’s transport authorities, the closure window was lengthened several times through the morning, first to 9:30 a.m. and subsequently to later in the day as new tests confirmed continuing ash dispersion. National outlets report that meteorological checks at Soekarno-Hatta detected the presence of volcanic particles, prompting officials to maintain the airport’s aerodrome closed status for safety reasons.

Regional media coverage indicates that Soekarno-Hatta was not the only facility affected. Notices referencing Anak Krakatau’s ash cloud also led to suspensions at Halim Perdanakusuma Airport in east Jakarta and several other airports on Sumatra and Java, tightening capacity on key domestic and regional routes.

The shutdowns follow a series of eruptions at Anak Krakatau, the volcanic island in the Sunda Strait between Java and Sumatra, which sent plumes of ash thousands of meters into the sky. Aviation advisories for western Indonesia highlighted drifting ash clouds over Banten, Jakarta, parts of West Java and Lampung, putting busy air corridors under heightened alert.

Hundreds of flights disrupted and passengers stranded

Data compiled by Indonesia’s airport operator InJourney Airports and circulated through national news reports show extensive disruption at Soekarno-Hatta. One tally cited by state news agencies indicates that more than 200 scheduled aircraft movements were cancelled during the initial closure window alone, affecting over 20,000 passengers on both domestic and international services.

As the closure period was extended into the afternoon, updated figures from the operator, shared via Indonesian media, pointed to more than 700 scheduled movements at Soekarno-Hatta classified as impacted. Some were outright cancellations, while others were subject to delays and rescheduling as airlines worked around the restricted airspace and limited slots at alternative airports.

Coverage from international wire services notes that when combined with temporary shutdowns at secondary airports, the cumulative impact reached well over 1,500 flights nationwide, with around 170,000 travelers estimated to have been affected by cancellations or knock-on disruption. Congestion built up at terminals as passengers waited for updates on revised departure times or rerouting options.

At Soekarno-Hatta’s main terminals, images published by Indonesian outlets show departure boards filled with cancelled flights and crowds lining service counters. Airport management advisories urged passengers with bookings on the day of the closure to confirm their flight status with airlines and to postpone travel to the airport where possible to ease pressure on terminal facilities.

Airlines adjust schedules and reroute traffic

Carriers serving Jakarta moved quickly to alter schedules as the full scope of the volcanic ash disruption became clear. A travel advisory from AirAsia, for example, stated that all of the airline’s flights to and from Jakarta were either cancelled or rescheduled after the temporary closure of Soekarno-Hatta, with further adjustments to routes operating in nearby airspace that might intersect with the ash cloud.

Regional coverage from Singapore and Malaysia indicates that services operated by major Southeast Asian and Middle Eastern airlines into Jakarta were also cancelled or consolidated, with some passengers rebooked via alternative gateways such as Singapore or Kuala Lumpur. Airlines advised travelers to monitor flight status pages and mobile apps rather than rely on previously issued itineraries.

Indonesia’s domestic carriers, which rely heavily on Soekarno-Hatta as a hub, faced complex rescheduling challenges. Public statements from the airport operator referenced the use of standard re-accommodation procedures, including rebooking on later flights and providing basic assistance for stranded passengers, in line with each airline’s policies.

Industry analysts quoted in regional commentary noted that volcanic ash incidents tend to have cascading effects beyond the immediate closure period, as aircraft and crews are displaced from their planned rotations. Travelers connecting onward from Jakarta in the coming days are being advised in published travel reports to allow additional time and to anticipate potential last minute gate or timing changes.

Why volcanic ash grounds aircraft

The decision to suspend flying operations around Jakarta aligns with established international aviation safety practices for volcanic ash events. Guidance from the International Civil Aviation Organization warns that even relatively light ash concentrations can pose serious risks to jet engines, including erosion, blocked sensors and in severe cases engine failure when molten ash fuses inside turbines.

Ash particles can also abrade aircraft windshields and control surfaces, reduce visibility and contaminate airport infrastructure. For that reason, aviation authorities typically err on the side of caution when ash is detected in or near approach and departure paths, particularly in heavily trafficked terminal airspace like that surrounding Soekarno-Hatta.

Indonesia sits on the Pacific Ring of Fire and is no stranger to such disruptions. Past eruptions of volcanoes including Eyjafjallajokull in Iceland and Mount Agung in Bali have shown how ash clouds can ground aircraft far from the eruption site itself. In this case, Anak Krakatau’s location roughly 150 kilometers from Jakarta still allowed ash to drift over the capital under prevailing winds, according to meteorological assessments referenced in local reports.

Aeronautical notices issued for this event detail the step by step extension of the closure periods as test results and satellite imagery came in. These measures are designed to prevent aircraft from encountering undetected ash in flight and to allow time for thorough inspections once operations gradually resume.

What travelers should know if flying to or from Jakarta

With the situation described as fluid in airline and airport advisories, travelers planning to use Soekarno-Hatta and other affected airports are being urged in public guidance to remain flexible. Many carriers serving Jakarta have activated waivers that allow passengers to change travel dates or reroute without additional fees within a specified period, subject to seat availability.

Travel industry reports recommend checking flight status directly on airline websites or apps before leaving for the airport, even if a flight appears confirmed. Passengers already at the airport are advised to stay close to departure gates or customer service desks for updates, as reopening times for the airspace may shift if Anak Krakatau’s activity changes.

Those with imminent international connections through other hubs may need to coordinate closely with both their Jakarta carrier and onward airline to protect their itineraries. Some travel advisors suggest building in extra connection time over the next several days for itineraries touching Indonesia, to account for aircraft repositioning and residual delays.

While the current closures are described in official notices as temporary, experts cited in regional coverage emphasize that volcanic situations can evolve quickly. For now, travelers are being encouraged to prioritize safety, monitor official travel advisories and prepare for the possibility that services into and out of Jakarta may remain constrained until ash levels subside and full visibility over conditions aloft is restored.

Sources: ANTARA News; Bernama; Al Jazeera; Kementerian Perhubungan RI; AirAsia Newsroom