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Volcanic ash from Indonesia’s Anak Krakatau has led to the temporary closure of eight airports across western Indonesia, suspending hundreds of flights and stranding tens of thousands of travelers as aviation authorities monitor ash plumes drifting over key air corridors.
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Widespread airport closures across western Indonesia
Published coverage from Indonesia’s Transport Ministry and aviation agencies indicates that airport closures began on Sunday, 6 September 2026, after ash from Anak Krakatau spread across parts of Java and Sumatra and into busy air routes serving Jakarta. Notices to Air Missions (NOTAMs) extended those suspensions into Monday, 7 September, affecting domestic and international operations.
Statements released through the Ministry of Transportation show that eight airports were placed under temporary closure, including Jakarta’s main gateway Soekarno Hatta International Airport and the city’s secondary Halim Perdanakusuma Airport. Other affected gateways include Husein Sastranegara in Bandung, Radin Inten in Lampung, and several smaller regional airports in Sumatra and Java that lie beneath the ash cloud’s projected path.
According to ministry data and Indonesian news reports, the closures and airspace restrictions have affected hundreds of flights since Sunday. Monitoring updates cited by local media mention more than 900 flight movements impacted at Soekarno Hatta alone on 6 September, as inbound and outbound services were halted or diverted to alternative hubs in Southeast Asia and other parts of Indonesia.
Coverage from international news agencies and regional outlets notes that while some airports briefly reopened for limited operations, NOTAM extensions and continuing ash detection in key flight levels prompted renewed suspensions. As of Monday morning local time, ministry briefings and aviation advisories continued to list eight airports as temporarily closed or heavily restricted.
Thousands of passengers stranded as airlines scramble
Regional news services and aviation trackers describe scenes of extended delays and cancellations as airlines adjusted schedules around the sudden loss of capacity at Indonesia’s busiest hub. Passenger numbers compiled by airport operators and relayed through local media indicate that tens of thousands of travelers have been affected since early Sunday.
Reports from Jakarta’s Soekarno Hatta highlight long queues at check in and rebooking desks as carriers attempted to consolidate flights, arrange hotel accommodation where possible, and reroute some passengers through alternate airports in Indonesia, Singapore, and Malaysia. Some airlines opted to position aircraft away from the ash-affected airspace, further limiting immediate options for stranded travelers.
Publicly available figures from Bernama and Indonesian transport updates point to several hundred flights cancelled or delayed at Soekarno Hatta, with additional disruptions at Halim Perdanakusuma and in provincial cities such as Bandung and Lampung. Domestic routes linking Jakarta with major Indonesian destinations, as well as popular international connections to regional hubs, have been particularly affected.
Travelers have been advised through airline channels and airport announcements to expect rolling changes to departure times and routings while ash advisories remain in place. Aviation data services referenced in regional coverage show a steady stream of diversions and airborne holding patterns around western Java since the first NOTAMs were issued.
Monitoring ash plumes above Sunda Strait and Java
Anak Krakatau, located in the Sunda Strait between Java and Sumatra, has been under close observation by Indonesia’s meteorology and volcanology agencies since signs of heightened activity were detected in early September. Bulletins from the Meteorology, Climatology, and Geophysics Agency (BMKG) detail continuous monitoring of ash dispersion at various flight levels using satellite imagery, ground-based sensors, and pilot reports.
Volcanic Ash Advisories circulated through BMKG channels and specialist aviation meteorology centers show ash spreading northwest and west from the volcano over the weekend, with concentrations at cruising altitudes used by commercial jet traffic. Additional layers of ash closer to the surface have been tracked moving over parts of Banten, Lampung, and areas off the west coast of Sumatra.
These advisories, combined with SIGMET warnings distributed to airlines and air traffic control, have underpinned successive NOTAMs restricting flight operations over western Java and the Sunda Strait. Transport Ministry updates emphasize that closures are being reviewed periodically in line with the latest ash modeling, and that airports will reopen only once the risk to aircraft engines and onboard systems is assessed as acceptable.
Indonesia’s national disaster management agency and volcanology center have also continued to monitor seismic signals at Anak Krakatau. Published updates describe prolonged eruptive phases and sustained ash emission, with authorities urging communities in the immediate vicinity of the volcano to remain alert to possible changes, even as the primary travel impact is being felt in the aviation sector.
Travel advice and options for affected passengers
For travelers currently in Indonesia or with imminent plans to transit through Jakarta and affected regional airports, airlines and travel agents are recommending close monitoring of flight status and direct communication with carriers. Many airlines operating at Soekarno Hatta and Halim Perdanakusuma have announced flexible rebooking policies and, in some cases, fee waivers, as summarized in regional travel coverage.
Travel industry reports suggest that passengers with nonessential travel scheduled over the coming days may wish to postpone their journeys or reroute through unaffected Indonesian cities where capacity is available. Some international itineraries are being reconfigured to connect via Surabaya, Denpasar, or overseas hubs, although these alternatives are subject to seat availability and further developments in ash dispersion.
Updated information about airport operating status is being published on official Indonesian government and aviation websites, alongside advisories from BMKG on ash movement. Travelers are encouraged in public-facing guidance to verify airport and airline announcements on the day of departure rather than relying on historical schedules, as NOTAM changes can occur at short notice.
Tour operators and corporate travel managers are also tracking the situation, with some advising clients to build in additional time for journeys that require surface connections to or from alternative airports. As Anak Krakatau’s activity and prevailing winds evolve, the scale and duration of disruption will likely hinge on how quickly ash concentrations diminish over key air routes in western Indonesia.
Indonesia Ministry of Transportation update on eight airport closures
BMKG advisory on Anak Krakatau ash and airport impacts
Al Jazeera coverage of Anak Krakatau airport disruptions
Bernama report on Anak Krakatau ash disrupting eight airports