Travellers scramble for new flights after Anak Krakatau eruption

Thousands of travellers in Indonesia and across Southeast Asia are racing to rebook journeys after the eruption of Mount Anak Krakatau forced Jakarta’s Soekarno-Hatta International Airport to suspend operations and triggered widespread flight cancellations on Sunday.

Flight suspensions ripple through Jakarta and the region

Publicly available information shows that flight operations at Soekarno-Hatta International Airport, Indonesia’s busiest aviation hub, were halted on Sunday after ash from the Anak Krakatau eruption drifted across key flight paths. The suspension, introduced in the early hours of September 6, affected both domestic and international services connecting Jakarta with major cities in Asia and beyond.

Data released by airport and aviation operators indicate that more than 200 flights were disrupted during the closure window, ranging from outright cancellations to diversions and lengthy delays. Figures from Indonesia’s state-linked airport operator InJourney point to at least 209 cancelled movements at Soekarno-Hatta alone, including 160 domestic flights and nearly 40 international services on popular routes such as Singapore, Kuala Lumpur, Hong Kong, Sydney and Doha.

Coverage from regional outlets adds that a broader count of affected operations, including delays and diversions, reached more than 300 flights during the peak of the disruption. Airlines adjusted schedules repeatedly through the day as the ash plume and wind patterns shifted, creating further uncertainty for passengers already en route to the airport.

Jakarta’s main gateway, which typically handles more than 1,000 aircraft movements per day, reduced activity to essential operations only while aviation authorities and meteorological agencies assessed ash density at cruising altitudes. Flight tracking platforms showed aircraft holding or diverting to alternative airports on Java and Sumatra as crews sought safe routes around the cloud.

Travellers stranded in terminals and transit hubs

The abrupt shutdown left departure halls crowded with stranded passengers at both Soekarno-Hatta and regional hubs such as Singapore’s Changi Airport. Reports from local media in Singapore describe long queues forming at airline assistance counters as passengers learned that flights to and from Jakarta had been grounded, sometimes after they had already checked in or cleared immigration.

Channel NewsAsia’s on-the-ground coverage highlighted travellers at Changi who only discovered their flights were cancelled once they reached boarding gates, citing confusion caused by differing information from airline websites, text messages and airport displays. In Jakarta, similar scenes were documented in local and international media, with long lines at ticket desks and passengers scrolling through their phones to seek new itineraries or contact travel agents.

Regional news reports describe families attempting to rearrange holiday plans, workers rushing to rebook business trips, and Indonesian citizens who had timed flights for key life events such as medical appointments or returning home to give birth. With seats on remaining services quickly snapped up, many travellers faced the prospect of overnight stays in airport hotels or last-minute searches for accommodation in Jakarta and neighbouring cities.

Those already in transit bore the brunt of the uncertainty, with some passengers reportedly turned back from boarding at origin airports and others finding their inbound flights diverted to alternative Indonesian airports when Soekarno-Hatta’s closure was extended into the afternoon.

Airlines race to reshuffle schedules and aircraft

Airlines operating in and out of Jakarta launched rapid schedule reviews as the impact of the eruption became clear. According to published coverage from regional and international news organisations, carriers including Indonesia’s flag airline and several major Asian and Middle Eastern brands cancelled or delayed multiple Jakarta rotations while they evaluated ash forecasts and aircraft positioning.

Singapore-based outlets report that Singapore Airlines cancelled and delayed several flights between Changi and Jakarta as the airport closure window widened, while low cost and full service carriers across the region announced rolling disruptions on social media and through mobile alerts. Some airlines opted to consolidate under-booked services onto a smaller number of flights once conditions improved, freeing up aircraft and crew to operate recovery services later in the day.

Aviation specialists quoted in global coverage note that disruptions of this magnitude can create cascading effects across an airline’s wider network, especially when a large hub like Soekarno-Hatta is involved. Aircraft and crew stranded in one location can cause knock-on schedule changes in other cities for days, as carriers work through maintenance requirements, duty time limits and aircraft rotations.

Publicly available industry guidance also underscores that flying through ash can damage jet engines and airframes, making conservative decisions about airspace closures standard practice whenever dense plumes are detected near flight corridors. That precaution, while disruptive for travellers, remained the main driver behind the flight suspensions on Sunday.

Volcanic ash cloud and safety assessments

Anak Krakatau, situated in the Sunda Strait between Java and Sumatra, has been in a period of increased activity in recent days, with Indonesia’s meteorology and volcanology agencies reporting multiple eruptions and ash columns. According to local press in Jakarta, satellite imagery and ground observations on Sunday morning identified ash drifting at altitudes used by commercial jets, particularly over parts of Banten province and along approaches to Jakarta.

Reports from national media state that ash plumes on the Java side of the volcano rose to around 6,000 metres, with higher columns observed toward Sumatra. That pattern prompted aviation advisories for carriers operating routes through the Sunda Strait and western Java, and ultimately led to the temporary shutdown of Soekarno-Hatta’s runways during the most intense phase.

International coverage notes that Anak Krakatau is the successor cone that emerged from the caldera of the original Krakatoa, the site of the catastrophic 1883 eruption. The current volcano has produced several significant events in recent decades, including a 2018 flank collapse that generated a deadly tsunami. While the latest eruption has not triggered such secondary hazards, it has underlined the continuing aviation risk posed by Indonesia’s numerous active volcanoes.

Volcanic ash is particularly hazardous to aircraft because fine particles can melt in high engine temperatures and then resolidify, damaging turbine blades and potentially causing power loss. As a result, aviation authorities rely on conservative no-fly buffers around ash clouds, informed by satellite data, pilot reports and dispersion models from regional volcanic ash advisory centres.

What travellers are doing to get moving again

With seat capacity limited and schedules in flux, travellers affected by Sunday’s eruption have turned to a mix of strategies to get moving again. News reports from Jakarta and Singapore indicate that many passengers immediately sought to rebook on later flights once tentative reopening times were announced for Soekarno-Hatta, while others opted to reroute via alternative Indonesian airports such as Surabaya or Bali.

Local and regional coverage notes growing use of airline apps and online travel platforms as passengers searched for remaining seats and monitored rolling timetable updates. Travel forums and social media feeds filled with posts from stranded passengers sharing real time information on which flights were operating, how long telephone hold times were, and whether carriers were offering hotel stays or meal vouchers during the disruption.

Travel advisories issued by insurers and consumer groups for previous Indonesian volcanic events highlight several recurring recommendations that remain relevant in the current situation. These typically include checking flight status directly with airlines before leaving for the airport, keeping all receipts for additional accommodation or transport in case of insurance claims, and being prepared for last minute changes even after airports reopen.

As ash levels gradually diminish and Soekarno-Hatta phases in more departures and arrivals, publicly available updates suggest that recovery flights and schedule adjustments are likely to continue into the coming days. For travellers in Indonesia and across Southeast Asia, the eruption has served as a stark reminder that in one of the world’s most volcanically active regions, itineraries can change quickly and flexibility is essential.

Al Jazeera – Indonesia’s main airport suspends flights due to Anak Krakatau eruption

Channel NewsAsia – Travel chaos hits Changi and Jakarta airports

Bernama – Anak Krakatau eruption temporarily closes Soekarno-Hatta International Airport

ANTARA – Anak Krakatau eruption cancels 209 Soekarno-Hatta flights

ABC News – Volcano Anak Krakatau eruption causes flight suspensions in Indonesia