Six Indonesian airports closed after Anak Krakatau erupts

Volcanic ash from Indonesia’s Anak Krakatau has led to the temporary closure of six airports across western Java and southern Sumatra, disrupting hundreds of flights and leaving thousands of passengers facing cancellations and long delays on Sunday.

Airports across western Indonesia halt operations

Publicly available information from Indonesia’s transport authorities shows that operations were suspended at six airports after Anak Krakatau sent an ash plume across busy air routes linking Jakarta with other parts of the archipelago. The initial shutdown centered on Soekarno-Hatta International Airport, the country’s main international gateway serving Jakarta, before quickly expanding as the ash cloud spread.

Reports indicate that flights were halted at Soekarno-Hatta and at Halim Perdanakusuma Airport, Jakarta’s secondary commercial and government-focused hub. Regional facilities including Husein Sastranegara Airport in Bandung, West Java, and Radin Inten II Airport near Bandar Lampung on Sumatra were also added to the closure list as ash drifted over their approach and departure paths.

Coverage from regional and international outlets notes that at least two smaller airports serving the Jakarta metropolitan area and nearby provinces were likewise affected, bringing the total number of airports with suspended operations to six. The closures were enacted through aviation notices to airmen (NOTAMs), which formally restrict takeoffs and landings in affected airspace until conditions are deemed safe for jet operations.

Air navigation authorities also restricted airspace segments over western Java and the Sunda Strait, forcing airlines to reroute or cancel services that would normally overfly the area. This has amplified the disruption beyond the closed airports themselves, rippling into domestic and some international routes that rely on Jakarta as a key connection point.

Scale of disruption for passengers and airlines

News reports compiled on Sunday describe widespread disruption across Indonesia’s aviation network, with hundreds of flights canceled or diverted as a direct result of the six-airport shutdown. Early tallies from national media and wire services point to several hundred flight movements affected within the first day of the eruption’s impact on air travel.

At Soekarno-Hatta International Airport, where passenger volumes are among the highest in Southeast Asia, images and videos shared by broadcasters and news agencies show crowded terminals and long queues at airline service counters. Passengers have reported extended waiting times for rebooking and limited availability on alternative flights, particularly on domestic trunk routes that rely heavily on Jakarta as a hub.

According to multiple outlets, the suspension of operations at Bandung and Bandar Lampung has added pressure to the network by reducing alternative points of entry on either side of the Sunda Strait. Travelers attempting to reach West Java or southern Sumatra have been encouraged in public advisories to monitor airline channels closely and consider overland or sea travel where feasible.

For airlines, the immediate impact includes lost revenue from canceled flights and additional costs associated with crew repositioning, aircraft parking, and potential overnight accommodation for stranded passengers. Industry analysts quoted in recent coverage warn that even a relatively short closure window can trigger longer-term scheduling challenges, as aircraft and crew rotations fall out of sync.

Why volcanic ash is so hazardous to aircraft

Aviation safety guidance from international regulators explains that volcanic ash poses a serious threat to aircraft engines, windscreens, sensors, and control surfaces. The fine, abrasive particles can melt inside jet engines at high temperatures, then resolidify on turbine blades, potentially causing a dangerous loss of thrust or complete engine failure.

Research and technical papers from organizations such as the International Civil Aviation Organization describe how ash clouds can also reduce visibility, interfere with onboard instruments, and contaminate cabin air systems. Because ash clouds are often difficult to distinguish from ordinary meteorological clouds on radar, flight crews and air traffic controllers rely heavily on satellite imagery, specialized advisory centers, and ground-based monitoring to assess risk.

Experience from earlier eruptions in Indonesia and elsewhere shows that even small amounts of ash on runways and taxiways can complicate airport operations long after an eruption subsides. Cleaning and inspection of pavements, lighting systems, and navigational aids can be time-consuming, requiring specialized equipment and coordination between airport operators and aviation regulators.

As a result, aviation contingency plans generally prioritize caution, suspending operations whenever ash concentrations in critical flight levels or over an airport exceed conservative thresholds. The Indonesian closures around Anak Krakatau fit this pattern, with authorities opting to halt flights as soon as monitoring data indicated a significant ash presence in the vicinity of major airports.

Prospects for reopening and alternative travel options

By Sunday evening local time, some outlets were already reporting evolving assessments of the situation, with the possibility that additional airports could be added to or removed from the closure list as ash disperses or wind patterns change. Official NOTAM updates and meteorological reports are being used to determine when each of the six closed airports can safely resume limited operations.

Regional media note that several unaffected airports in Java and other islands have extended operating hours to serve as alternates, creating potential relief valves for stranded travelers once airlines can reposition aircraft. Rail and intercity bus operators are also expected to see increased demand as passengers seek overland alternatives to heavily impacted air routes.

Travel advisories circulated by news organizations and aviation-focused outlets strongly recommend that passengers avoid going to airports without a confirmed, operating flight. Instead, travelers are urged to check airline websites and apps frequently, sign up for notifications, and maintain flexibility around routing, dates, and even destination airports within Indonesia.

Given Anak Krakatau’s history of intermittent activity, aviation analysts caution that further disruptions remain possible if eruptions continue or intensify. However, the combination of real-time satellite monitoring, established contingency plans, and experience from previous ash-related closures is expected to help Indonesian aviation authorities gradually restore connectivity while keeping risk to aircraft and passengers as low as possible.

Wider context for volcanic disruption of air travel

The Anak Krakatau event is the latest reminder of how quickly volcanic activity can affect air transport across wide regions. Past eruptions in Indonesia, including those involving Mount Ruang and other volcanoes in the archipelago, have periodically forced airport closures and large-scale rerouting of flights as ash clouds intersect busy traffic corridors.

Globally, aviation has grappled with similar challenges, from the 2010 Icelandic eruption that closed much of European airspace to more localized events in the Mediterranean and Pacific regions. Each episode has underscored the need for close coordination between meteorological agencies, volcano observatories, and aviation authorities, as well as clear communication to airlines and the traveling public.

Technical guidance published for airport operators stresses the importance of pre-planned response measures, including rapid assessment of ash contamination, protection of critical equipment, and phased reopening strategies once conditions improve. These protocols are designed to minimize both safety risks and economic losses by enabling airports to resume operations as soon as it is demonstrably safe to do so.

For travelers, the situation around Anak Krakatau highlights the value of flexible itineraries, comprehensive travel insurance, and careful attention to airline communications in regions where volcanic hazards are present. While the six Indonesian airports affected today are expected to reopen as ash levels allow, the episode underlines that even modern aviation networks remain vulnerable to sudden natural events.

ANTARA News: Indonesia suspends six airports amid Anak Krakatau ash spreads

South China Morning Post: Anak Krakatoa eruption disrupts flights at 6 airports

Al Jazeera: Indonesia’s main airport suspends flights due to Anak Krakatoa

ITV News: Hundreds of flights cancelled after Indonesian volcano erupts

Los Angeles Times: Volcanic island in Indonesia erupts, forcing flight cancellations