More news on this day
Thick volcanic ash from Indonesia’s Mount Anak Krakatau has disrupted air travel across western Indonesia, grounding flights at major airports and prompting thousands of stranded passengers to complete their journeys by bus and train instead.
Get the latest news straight to your inbox!
Airports closed and flights diverted across western Indonesia
Air travel into and out of Jakarta and several other cities has been heavily disrupted after Mount Anak Krakatau sent ash clouds drifting over key flight corridors in western Indonesia. Reports indicate that volcanic ash has forced suspensions or reductions of operations at multiple airports, including Jakarta’s Soekarno Hatta International Airport, with hundreds of flight cancellations and delays affecting domestic and international routes.
Publicly available information from aviation and government portals shows that airspace closures began on Sunday, 6 September 2026, after ash was detected at cruising altitudes used by commercial jets. Notices to airmen flagged the risk of ash ingestion in aircraft engines and reduced visibility around Jakarta’s main airport, leading airlines to cancel services or divert aircraft to alternative gateways in Java and Sumatra.
International carriers serving Jakarta, including regional hubs in Singapore and Australia, have faced schedule disruptions as aircraft and crews are displaced from their normal rotations. Coverage from regional and global media notes that disrupted services include long haul and short haul routes, creating knock on effects across Southeast Asia’s busy aviation network.
Although volcanologists report that eruptive activity has eased from its initial peak, monitoring agencies continue to track ash plumes drifting above the Sunda Strait and Java, and aviation restrictions remain in place on several routes while conditions are reassessed.
Passengers rerouted to buses, regular rail and high speed trains
With dozens of flights canceled or diverted, stranded travelers have turned to Indonesia’s extensive land transport network to continue their journeys. Coverage in Indonesian and regional media describes long queues at bus terminals and railway stations in Jakarta and other major cities, as passengers rebook trips onto intercity buses, conventional trains and the Whoosh high speed rail line linking Jakarta and Bandung.
According to published coverage, the government and transport operators have activated contingency plans that include free or subsidized transfers for passengers arriving at alternative airports. Flights originally scheduled for Jakarta have been rerouted to Kertajati Airport in West Java, where onward travel is being arranged by bus and high speed train so that passengers can reach the capital without flying through ash affected airspace.
The state owned railway operator, PT Kereta Api Indonesia, has announced additional services on key corridors connecting Jakarta with cities such as Surabaya, Yogyakarta, Semarang and Malang. Company statements highlight that tracks and signalling systems remain unaffected by ash fall, allowing rail operations to continue while remaining under close observation from meteorological and geological agencies.
Bus companies serving Java’s main highways have also reported increased demand on routes into the Greater Jakarta area, particularly from travelers who chose to abandon long waits at airports in favor of overnight road journeys. Media footage from terminals in West Java and Central Java shows passengers carrying cabin sized luggage and airline tags as they board intercity coaches instead of planes.
Service recovery measures aim to keep travelers moving
Transport authorities have emphasized keeping people moving as a priority while aviation restrictions remain in force. Publicly available information from Indonesia’s transport ministry outlines a Service Recovery Activation framework in response to the Anak Krakatau ash cloud, under which free bus and train options are deployed when scheduled flights are suspended for safety reasons.
At Soekarno Hatta Airport, airport operators have coordinated with bus operators to stage additional coaches for passengers whose flights were diverted to other airports or postponed indefinitely. Similar arrangements have been reported at Kertajati, where travelers landing on diverted flights are being guided to ground transport counters for onward travel to Jakarta and Bandung.
Rail services are playing a particularly prominent role in the recovery plan. Articles published by the national rail operator describe intensified monitoring of tracks and structures near areas affected by ash fall, while maintaining normal timetables wherever possible. The Whoosh high speed train, which links Jakarta’s Halim station with Bandung in under an hour, has become a key alternative for passengers rerouted through West Java.
Travel industry observers note that the coordinated use of buses, conventional rail and high speed rail has allowed Indonesia to reduce the number of stranded passengers in airport terminals, even as ash related disruptions extend into a second day. However, seating on some peak services has tightened, and travelers are being encouraged to check availability and book early when switching from air to land transport.
Tourism and business trips disrupted at the start of peak season
The Anak Krakatau ash related closures have arrived at a busy period for domestic and regional travel, with many Indonesians returning from holidays and foreign visitors transiting through Jakarta to other destinations. News reports describe thousands of travelers experiencing missed connections, last minute itinerary changes and extended stopovers as airlines work through backlogs.
Jakarta’s role as a hub for onward flights to destinations including Bali, Yogyakarta and Medan has amplified the impact. Passengers connecting from long haul flights have found themselves bused to other airports or encouraged to reroute through cities still operating normally, such as Surabaya or Denpasar, before continuing by land or air to their final destination.
Tour operators and hotels have indicated through public statements and booking updates that they are accommodating late arrivals and no show guests more flexibly during the disruption. Travelers already in popular destinations such as Bali and Lombok are being advised through travel advisories and airline updates to monitor flight status closely, with some services rerouted away from Jakarta controlled airspace while ash continues to drift.
Business travelers are also adjusting plans, rescheduling meetings or switching to virtual formats where possible. For those whose presence is required in Jakarta, published coverage indicates a sharp rise in demand for intercity business class rail tickets and private car services on Java’s main toll roads.
Ongoing monitoring of Anak Krakatau’s activity
Mount Anak Krakatau, a volcanic island in the Sunda Strait between Java and Sumatra, has a long history of intermittent activity and sits on one of Indonesia’s most closely watched volcanic arcs. According to geological agencies and disaster management bodies, the current eruptive phase intensified in early September 2026, sending ash columns several kilometers into the atmosphere and prompting aviation alerts.
Indonesia’s volcanology and disaster management agencies continue to monitor tremors, gas emissions and ash dispersal from Anak Krakatau through a combination of ground based instruments and satellite observations. Public updates emphasize that while the strongest explosive bursts have eased compared with the initial eruption, the volcano remains active and further ash producing events are possible.
Experts cited in regional media note that volcanic ash presents a particular hazard to jet engines and aircraft avionics, even when the eruption itself is moderate by historical standards. For that reason, airspace closures are likely to be maintained or reimposed whenever ash clouds intersect major flight paths, regardless of clear weather at ground level around affected airports.
Until monitoring agencies confirm that ash concentrations at flying altitudes have diminished to safe levels, transport planners expect Indonesia’s buses and trains to remain a critical backup for travelers moving between major cities. Travelers passing through the region in the coming days are being urged by airlines, rail operators and tourism boards to maintain flexible itineraries and to allow extra time for overland connections when flying through western Indonesia.
Antara News: Free transports ready as Anak Krakatau ash shuts Soekarno-Hatta airport
Channel NewsAsia: Jakarta airport suspends flights due to Mount Anak Krakatau ash
ABC News: Mount Anak Krakatau volcanic eruption impacts Jakarta flights