Kuala Lumpur–Jakarta Flights Hit as Anak Krakatau Disrupts Travel

Travel between Kuala Lumpur and Jakarta faced sudden disruption on 6 September 2026 as Malaysia Airlines cancelled multiple services following the eruption of Mount Anak Krakatau, with ash clouds forcing the temporary closure of Jakarta’s main airport and triggering wider schedule changes across the region.

Malaysia Airlines Cancels Kuala Lumpur–Jakarta Services

Publicly available information from Malaysia Airlines shows that the carrier cancelled a series of flights between Kuala Lumpur (KUL) and Jakarta’s Soekarno-Hatta International Airport (CGK) on 6 September 2026 due to volcanic ash from Mount Anak Krakatau drifting into Jakarta’s airspace. The airline listed at least a dozen affected services in both directions, including flight numbers MH713, MH712, MH711, MH710, MH717, MH716, MH721, MH720, MH723, MH722, MH725 and MH724, effectively suspending its Kuala Lumpur–Jakarta operations for much of the day.

The move followed aviation safety protocols that treat volcanic ash as a significant hazard to jet engines and aircraft systems. Malaysia Airlines indicated it was closely monitoring developments and adjusting operations as the ash plume evolved, with the intention of resuming normal services once conditions and regulatory guidance allowed.

Regional news coverage indicates that Batik Air and other carriers operating on Malaysia–Jakarta routes also cancelled flights, adding to the disruption on one of Southeast Asia’s busiest business and leisure corridors. Kuala Lumpur–Jakarta is a key short-haul link for corporate travelers, migrant workers and connecting long-haul passengers, magnifying the ripple effects of any prolonged shutdown.

Jakarta Airport Closure Sends Shockwaves Through Regional Networks

Reports from Indonesian and Malaysian news outlets describe a temporary closure of Soekarno-Hatta International Airport after volcanic ash from Anak Krakatau was detected in the vicinity of the capital’s main gateway. Indonesia’s transport authorities suspended operations until early afternoon local time on 6 September, halting hundreds of movements and forcing airlines to cancel, delay or reroute services.

Data published by regional wire services indicates that more than 200 flights in and out of Jakarta were disrupted, affecting tens of thousands of passengers across domestic and international networks. Services linking Jakarta to Kuala Lumpur, Singapore, Hong Kong, Sydney, Seoul, Doha and Amsterdam were among those cancelled, delayed or rescheduled as airlines sought to avoid the contaminated airspace.

The sudden closure also created knock-on impacts for aircraft and crew rotations. Carriers with overnight and early-morning Jakarta departures had to reposition jets or leave them on the ground, complicating schedules later in the day on unrelated routes. Aviation authorities emphasized that restoring the timetable would take time even after the immediate hazard subsided, given the need to sequence arrivals, manage backlogs and reassign aircraft.

AirAsia, Batik Air and Other Carriers Adjust Kuala Lumpur Operations

The effects of Anak Krakatau’s renewed activity extended beyond Malaysia Airlines. Low-cost operator AirAsia reported that a number of its flights to and from Jakarta were cancelled or rescheduled as the ash cloud spread across western Indonesia and into regional flight corridors. The airline announced operational changes through its newsroom and advisories, citing the evolving nature of the eruption and the need to keep aircraft clear of contaminated airspace.

News reports from Malaysia highlight that Batik Air joined Malaysia Airlines in cancelling services between Malaysian cities and Jakarta on 6 September, bringing the total number of affected Malaysia–Jakarta flights to around twenty across the two carriers alone. Additional cancellations and schedule changes were reported by other Southeast Asian and long-haul airlines that rely on Jakarta as a hub or key destination.

For Kuala Lumpur International Airport, the disruption appeared concentrated on Indonesia-bound services, particularly the dense shuttle traffic to Jakarta. Flights to other regional destinations continued to operate, although some carriers introduced routing or altitude adjustments on services skirting the impacted airspace. Airport and airline updates advised travelers to check the latest status of their flights before heading to the terminal.

Passengers Face Delays, Rerouting and Policy Waivers

For travelers, the immediate impact of the Anak Krakatau eruption was felt in long waits, missed connections and hastily rearranged itineraries. With multiple Kuala Lumpur–Jakarta flights cancelled across several airlines, seat availability on alternative services tightened quickly, and some passengers were rebooked on later dates or via different regional gateways such as Singapore.

Malaysia Airlines and other carriers indicated through public advisories that affected customers could make changes without standard penalties, in line with typical commercial waivers used during major weather or geophysical events. These measures included options such as rebooking on another date, rerouting where capacity permitted or converting unused tickets into credits, subject to each airline’s conditions of carriage.

Travel industry observers noted that the disruption once again underscored the vulnerability of high-frequency regional routes to natural hazards, particularly in seismically active regions like Indonesia. Even a short closure of a hub such as Soekarno-Hatta can cascade through airline networks, affecting passengers far beyond the immediate area of the eruption.

Monitoring Continues as Anak Krakatau Activity Persists

Indonesia’s meteorological and geophysical agency has intensified monitoring of Anak Krakatau, focusing on ash dispersion, atmospheric impacts and potential hazards to aviation and maritime operations in the Sunda Strait. Satellite imagery and ground-based observations are being used to issue regular updates to aviation stakeholders, guiding decisions on airspace management and airport operations.

Media coverage indicates that the current eruptive phase follows months of elevated activity at the volcano, which sits roughly between Java and Sumatra. While the ash plume’s height and direction can shift with changing wind and eruption dynamics, aviation protocols require conservative routing whenever ash is present along flight paths, leading to rapid schedule adjustments such as those seen on the Kuala Lumpur–Jakarta corridor.

Airlines serving Southeast Asia are expected to keep contingency plans in place over the coming days, including flexible rostering and spare capacity where available, in case further ash episodes affect Jakarta or nearby airports. For travelers, industry guidance continues to emphasize monitoring airline channels closely, allowing additional time for connections and considering travel insurance coverage for geophysical disruption on routes near active volcanoes.

Malaysia Airlines: Cancellation of flights to/from Jakarta on 6 September 2026

Malay Mail coverage of Malaysia–Jakarta flight cancellations

Bernama report on Anak Krakatau disruption at Soekarno-Hatta International Airport

Free Malaysia Today: More airlines cancel flights to Jakarta