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Indonesia’s Anak Krakatau volcano erupted early Sunday, sending ash clouds across western Indonesia and prompting the temporary closure of Jakarta’s Soekarno-Hatta International Airport along with widespread disruptions to domestic and international flights.
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Airport closure halts traffic at Indonesia’s main gateway
Jakarta’s Soekarno-Hatta International Airport, one of Southeast Asia’s busiest hubs, suspended operations in the early hours of Sunday after volcanic ash from Anak Krakatau was detected over the airfield. Notices to airmen indicated that the airport’s airspace was initially closed from around 1:30 a.m. to 5:30 a.m. local time, with subsequent updates extending disruption as ash continued to drift across key flight paths.
Monitoring data compiled by Indonesia’s civil aviation authorities showed that at least 33 flights were directly affected during the initial closure window at Soekarno-Hatta, including international and domestic services. Further counts from regional and international coverage indicate that as the morning progressed, a total of about 209 flight movements at the airport were disrupted, impacting more than 22,000 passengers on Sunday alone.
Published reports describe departure boards filled with canceled and delayed flights, with terminals remaining crowded as travelers waited for updated information. Some carriers chose to hold aircraft and crews in place until conditions were assessed as safe, while others moved quickly to cancel services and begin rebooking passengers for later in the day or the coming week.
The temporary shutdown at Soekarno-Hatta also affected movements at nearby airports serving the Jakarta region and western Java, including Halim Perdanakusuma and Lampung’s Radin Inten II, where several flights linked to the capital were either delayed or diverted as the ash cloud evolved.
Hundreds of flights disrupted across domestic and international networks
According to publicly available flight-monitoring data and Indonesian media tallies, the Anak Krakatau eruption led to cascading disruption across Indonesia’s air travel network. From Soekarno-Hatta alone, at least 16 international services were reported canceled, with additional flights delayed or rescheduled on routes connecting Jakarta with Singapore, Kuala Lumpur, Hong Kong, Sydney, Seoul, Doha and Amsterdam.
Airlines serving the Jakarta–Makassar corridor were particularly affected. Data released by Sultan Hasanuddin International Airport in Makassar indicated that 21 flights on Sunday’s schedule were impacted by the volcanic activity, with a mix of cancellations and lengthy delays on services to and from Jakarta. Regional coverage from Makassar described passengers waiting several hours for clarity as airlines adjusted timetables in response to changing ash forecasts.
Low-cost and full-service carriers across the region also reported knock-on effects. Travel advisories from at least one major regional airline confirmed that a number of flights to and from Jakarta had been canceled or rerouted due to the ash cloud, with additional operational changes on services whose usual flight paths cross the Sunda Strait region. Passengers were advised to monitor airline websites and mobile apps closely as schedules continued to shift throughout the day.
As cancellations accumulated, online flight trackers and local news outlets recorded widespread disruption not only at Jakarta’s main hub but also on connecting routes across Sumatra, Java and eastern Indonesia. Industry observers noted that even a closure lasting several hours at Soekarno-Hatta can ripple through airline networks for days, as aircraft and crew rotations are rebalanced.
Intensifying volcanic activity at Anak Krakatau
Anak Krakatau, located in the Sunda Strait between Java and Sumatra, has been in a state of elevated activity for months, with volcanological data pointing to a marked increase since July. Recent eruptions have produced ash plumes rising several kilometers into the atmosphere, and Sunday’s event was described in geological agency summaries and international wire coverage as the strongest in the current cycle.
Satellite imagery and ground-based monitoring indicated that the latest eruption sent thick ash clouds drifting predominantly toward the northeast and east, placing major population centers and critical aviation corridors under the plume. Aviation notices categorized the ash cloud at a level that requires significant caution for aircraft operations, due to the risk of engine damage and reduced visibility.
The current episode recalls previous disruptions linked to Anak Krakatau and other Indonesian volcanoes, which have occasionally forced airport closures in Jakarta, Bali and other destinations. However, early assessments suggest that the ash distribution pattern in this event has had a particularly direct impact on airspace around the capital, rather than more remote island airports.
Specialists continue to track seismic activity and ash emissions from the volcano, with Indonesia’s broader volcanic alert network maintaining heightened observation of the Sunda Strait area. Published advisories emphasize that the situation remains dynamic and that aviation guidance may shift rapidly if new eruptions occur.
Travelers face delays, diversions and evolving advisories
For travelers, the sudden airspace restrictions translated into overnight cancellations, missed connections and extended waits inside Jakarta’s terminals. Regional media reports and social media posts from passengers described long lines at airline service desks, crowded gate areas and uncertainty around departure times as carriers updated their plans through Sunday morning.
Some long-haul services destined for Jakarta were diverted to alternative hubs, including Singapore and other airports in the region, where passengers were provided with accommodation or onward travel options once new slots into Jakarta could be secured. In other cases, airlines pre-emptively canceled flights into Soekarno-Hatta, citing ash forecasts that indicated continuing operational risk.
Airlines have issued a variety of waivers and rebooking options, allowing passengers ticketed to or from Jakarta on affected dates to change travel plans without additional fees, subject to availability. Publicly available advisories encourage travelers heading to Indonesia over the coming days to check flight status frequently, ensure contact details are up to date in airline bookings, and allow extra time for connections where possible.
Travel industry analysts note that while most disruptions may be resolved within a few days if ash emissions subside, the scale of cancellations at Indonesia’s primary hub can create a backlog in both domestic and international traffic. This may lead to fuller-than-usual flights as operations normalize, as well as occasional last-minute schedule adjustments while airlines reposition aircraft.
What international visitors should know now
For overseas visitors planning trips to Indonesia, recent events highlight the importance of building flexibility into itineraries during periods of volcanic activity. Jakarta remains the country’s main gateway for many long-haul routes, so any closure at Soekarno-Hatta can quickly affect connections to popular leisure destinations including Bali, Yogyakarta and Komodo.
Travel advisories from regional governments and aviation authorities recommend that visitors monitor both airline channels and official meteorological or volcanology updates when planning transits through Jakarta in the near term. Some carriers may temporarily adjust routings or equipment types on Indonesia-bound services while ash conditions are evaluated, which can in turn affect baggage allowances or onboard services.
Travel insurers typically treat significant volcanic eruptions as natural events that may be covered under trip interruption or delay benefits, depending on policy wording. Industry commentators suggest that travelers review their coverage details, retain documentation from airlines confirming cancellations or delays, and keep receipts for any out-of-pocket expenses incurred due to schedule changes.
Despite the extensive disruption, Indonesia’s aviation and volcanic monitoring networks are widely regarded as experienced in managing ash-related incidents, following earlier high-profile eruptions across the archipelago. For most travelers, the primary impact is expected to be timing and routing, rather than long-term access to key destinations, provided Anak Krakatau’s activity does not escalate significantly beyond current levels.
Associated Press: Indonesia cancels flights at Jakarta airport as Anak Krakatau volcano erupts
Bernama: Anak Krakatau eruption temporarily closes Soekarno-Hatta International Airport
Antara: Krakatau volcanic activity disrupts Jakarta–Makassar flights
AirAsia: Flights impacted by the Mount Anak Krakatau volcanic eruption