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Volcanic ash from Indonesia’s Mount Anak Krakatau has triggered widespread flight cancellations across Southeast Asia, stranding students on their way to classes and families returning from holidays as key airports grind to a halt.
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Hundreds of flights disrupted as ash cloud spreads
Mount Anak Krakatau began a new phase of intense eruptive activity on the night of September 4, sending ash clouds high into the atmosphere and across the Sunda Strait. Indonesia’s disaster management agency reports that the current phase follows a steady increase in activity since July 2026, with continuous tremors and prolonged eruption episodes recorded in recent days.
As the ash plume drifted toward densely populated Java, it entered key air corridors serving Jakarta and nearby cities. By the morning of September 6, Indonesia’s Directorate General of Civil Aviation reported at least 373 flights affected by airport closures and extended shutdowns, including at Jakarta’s Soekarno Hatta International Airport, Halim Perdanakusuma, Radin Inten II in Lampung and several smaller facilities.
Soekarno Hatta, Indonesia’s main international gateway, temporarily halted operations, citing safety concerns related to volcanic ash in the airspace. Monitoring data shared by the airport and aviation authorities indicate that flights were suspended for several hours, prompting mass delays, cancellations and diversions that rippled throughout the region.
Regional carriers began publishing disruption notices as the situation escalated. Publicly available information from airline advisories shows that Singapore Airlines, AirAsia, Scoot and other carriers either cancelled or retimed multiple services on routes to and from Jakarta, Bandung and other Indonesian cities, with the possibility of further adjustments as ash forecasts evolve.
Students miss classes as term begins
The timing of Anak Krakatau’s renewed activity has collided with the start of the academic term in Singapore and other regional education hubs. According to published coverage from Singapore-based media, some Indonesian students traveling to begin university courses were unable to reach campus on schedule when flights from Jakarta were cancelled at short notice.
One widely reported case involved a 17 year old student bound for the Singapore University of Technology and Design whose Singapore Airlines flight on September 6 was cancelled after Soekarno Hatta closed. Local reports describe how the student was left searching for alternative routes just days before the first day of school, highlighting the wider impact on cross border education during peak travel weekends.
Airport disruption statistics shared by Changi Airport and cited by regional media suggest the scale of the problem. Between 1.30am and 1.30pm on September 6, more than 300 flights were affected by cancellations, delays, diversions and other operational changes. Many of these services connected Jakarta and Singapore, a route heavily used by students commuting between home and campus.
Education advisers and travel agents quoted in regional coverage note that such disruptions can have knock on effects for orientation sessions, student housing check ins and visa compliance timelines. While many universities allow flexibility for late arrivals caused by force majeure events, stranded students and their families are still facing additional expenses and uncertainty as they attempt to rebook scarce seats in the days ahead.
Holiday plans upended as travellers face extended stays
The eruption has also reshaped travel plans for leisure passengers across Southeast Asia, turning short breaks into unplanned extended holidays. Reports from Singapore and Malaysian media describe families returning from trips to China and other destinations who found their connecting flights to Jakarta cancelled after they had already arrived at Changi Airport.
Low cost carrier Scoot issued an advisory listing at least a dozen return flights between Singapore and Jakarta cancelled on September 6 as a precautionary measure due to volcanic ash. The airline stated that affected customers were being contacted with options to rebook or request a refund, but warned that schedules might continue to change as the situation evolves.
Similar notices from AirAsia outline cancellations and rescheduling of services involving Jakarta and nearby routes, with volcanic ash forcing adjustments to some flight paths as well as outright cancellations. Travelers sharing their experiences on social media and in Malaysian news reports describe crowded terminals, fully booked hotels near airports and limited availability on the next outbound flights, in some cases pushing departures several days ahead.
These unplanned delays are having practical consequences for travelers who had planned to return to work or school immediately after regional holidays. With accommodation and daily expenses mounting, many passengers are weighing whether to wait out the disruption, reroute via other Indonesian cities or postpone travel until airport operations stabilize.
Airlines activate waivers and flexible policies
In response to the mounting disruption, several carriers have activated flexible ticketing policies for passengers affected by Anak Krakatau’s ash cloud. Cathay Pacific, for example, published a special ticketing guideline for flights to and from Jakarta, waiving rebooking, rerouting and refund charges for tickets issued for travel around September 5 and 6, provided changes are made by early September and travel is completed by late November.
Other airlines have issued similar waivers, allowing customers to change travel dates without fees or to seek refunds if they choose not to proceed with their trips. Publicly available advisories from Singapore Airlines and Scoot outline options for retiming flights or rebooking on later services once conditions permit, while AirAsia has directed passengers to check real time flight status and make changes through its digital channels.
Aviation analysts note in regional commentary that such policies have become standard responses to major weather events and natural hazards, particularly in congested air corridors. However, they also point out that fee waivers do not resolve the underlying constraint of limited seat capacity when many flights on a single day are cancelled and passengers from multiple disrupted services are shifted onto later departures.
Travel insurers and consumer advocates quoted in local coverage advise passengers to document all expenses related to delays, including additional hotel nights and meals, as some insurance policies may cover costs arising from natural disasters. At the same time, they caution that coverage terms can vary widely, and travelers are being encouraged to review policy wording closely as the Anak Krakatau situation unfolds.
Uncertain outlook as volcanic activity continues
Indonesia’s national disaster agency reports that Anak Krakatau’s current eruption phase remains ongoing, with continuous tremors and at least one prolonged eruptive event of around six hours recorded in the early hours of September 5. Officials have described the activity as a continuation of elevated behavior that began in July, with periodic explosions and ash emissions.
Authorities have maintained an exclusion zone around the volcano and urged residents and tourists to stay away from the immediate vicinity. While the main impact on travelers so far has been through airspace closures and airport shutdowns, disaster management updates indicate that monitoring is continuing around the clock to assess any escalation that could affect coastal communities or maritime traffic in the Sunda Strait.
For aviation, the key variable is the movement and density of the ash cloud. International guidelines treat volcanic ash as a serious hazard, as particles can damage aircraft engines and sensors. As a result, air navigation service providers and airlines rely on satellite data, pilot reports and meteorological modeling to determine when it is safe to resume operations in affected airspace.
Given the fluid nature of the current eruption, travel advisories issued across the region consistently recommend that passengers check the latest status of their flights before leaving for the airport and ensure that contact details in their bookings are up to date. With major hubs such as Jakarta and Singapore closely linked by frequent services, even short term closures can have disproportionate effects on students, migrant workers and holidaymakers moving between Southeast Asian countries.
https://malaysia.news.yahoo.com/missed-classes-extended-holidays-passengers-103000708.html
https://www.channelnewsasia.com/singapore/travel-chaos-changi-airport-soekarno-hatta-volcano-6365516