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Thai Airways has cancelled four flights between Bangkok and Jakarta after Indonesia’s Anak Krakatau volcano sent ash over key air corridors, triggering large-scale flight suspensions at Jakarta’s main international gateway on Sunday.
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Targeted Thai Airways cancellations on Bangkok–Jakarta route
Publicly available information from Thai media indicates that Thai Airways cancelled four scheduled services between Bangkok and Jakarta on Sunday, September 6, 2026, citing the impact of volcanic ash from Anak Krakatau on flight operations and travel safety. The affected services were flight numbers TG433 and TG435 from Bangkok to Jakarta, and TG434 and TG436 from Jakarta to Bangkok.
The cancelled flights covered key daytime travel windows on the busy regional route. Timetables published in local coverage show TG433 scheduled to depart Bangkok at 8 am and arrive in Jakarta at 11.35 am, with return service TG434 due to leave Jakarta at 12.35 pm and arrive in Bangkok at 4.05 pm. Afternoon flight TG435 was scheduled to depart Bangkok at 2.20 pm for a 5.55 pm arrival in Jakarta, with the corresponding evening return, TG436, listed at 7 pm to 10.30 pm.
Reports indicate that the carrier framed the suspensions as a necessary response to evolving operational conditions at Jakarta’s Soekarno Hatta International Airport, where runway and airspace status were being reviewed as ash advisories changed through the day. The airline indicated it was working within its established conditions of carriage to rebook affected travelers or provide other support options.
Travel industry observers note that while the number of Thai Airways cancellations is modest in absolute terms, the disruption lands on one of Southeast Asia’s most heavily trafficked regional business and leisure corridors, intersecting with a broader wave of cancellations across multiple airlines operating into the Indonesian capital.
Jakarta’s main airport hit by rolling suspensions
The decision by Thai Airways came as Jakarta’s Soekarno Hatta International Airport moved through several phases of operational suspension in response to the drifting ash cloud. Airport advisories published on social media and cited in international coverage show that all flight operations were initially halted from 5.30 am local time, with an initial suspension window to 9.30 am later extended into the afternoon as monitoring continued.
Indonesian aviation operators and state airport management data cited by national news outlets report that more than 200 flights were cancelled at Soekarno Hatta alone on Sunday, with additional disruption at a cluster of nearby airports serving the wider Jakarta, Banten, Lampung and West Java regions. Figures released by Indonesia’s airport operator InJourney and carried by local wire services put cancellations at Soekarno Hatta at 209 flights over the course of the day, reflecting both inbound and outbound services.
The flight halt extended beyond international departures to include a large number of domestic routes, creating knock-on effects for connections within Indonesia. Coverage by regional broadcasters indicates that six airports, including Jakarta’s secondary Halim Perdanakusuma, Bandung’s Husein Sastranegara, and facilities in Lampung and Tangerang, experienced closures or operational restrictions as ash readings remained elevated.
For travelers, the rolling nature of the suspension windows meant that some flights were cancelled outright while others faced prolonged delays before subsequent cancellation notices were issued, complicating rebooking and onward travel plans throughout the day.
Anak Krakatau’s renewed activity and aviation risk
The disruption stems from renewed eruptive activity at Anak Krakatau, the volcanic island that sits in the Sunda Strait between Java and Sumatra. International wire reports note that the volcano showed increased activity from Friday, before a more forceful eruption early Sunday sent ash and smoke high into the atmosphere above western Indonesia.
Indonesia’s geological monitoring agencies have long classified Anak Krakatau as one of the country’s most closely watched volcanoes, due both to its eruptive history and its location along busy sea and air routes linking Java and Sumatra. The current episode has produced dense ash plumes that, according to multiple international news outlets, drifted more than 150 kilometers toward the Jakarta region, entering altitudes used by commercial aircraft.
Volcanic ash presents particular risks to aviation because it can damage jet engines, scratch cockpit windows, and interfere with onboard instruments. In response, global air traffic management practices call for conservative route planning and airport closures when ash is detected along common flight paths. In the Anak Krakatau case, Indonesian authorities have used test sampling and satellite imagery as part of their assessments for reopening affected airports.
For travelers planning journeys in the region, the episode underlines how quickly conditions around active volcanoes can change. While Anak Krakatau’s eruptions are primarily a geological and local maritime safety issue, ash transport by upper-level winds can extend its impact far beyond the immediate vicinity of the volcano.
Passenger support, refunds and regional travel impacts
According to local Thai reporting, Thai Airways has notified passengers booked on the four cancelled Bangkok–Jakarta services and is providing assistance in line with its standard conditions. Travelers have been directed to contact the airline’s customer channels or travel agents to arrange alternative dates or routing where available, subject to seat capacity as operations normalize.
On the Indonesian side, the Transportation Ministry has publicly committed to consumer protection measures covering all airlines impacted by the Anak Krakatau ash. State news agency reports indicate that the ministry has guaranteed 100 percent refunds for passengers whose services were cancelled due to ash-related airport closures, with an emphasis on electronic processing to expedite payouts and reduce congestion at service counters.
With six airports experiencing closures or severe restrictions, regional travel patterns across western Indonesia have been significantly altered. Domestic passengers heading to and from secondary cities have faced extended overland journeys or unplanned overnight stays, while international travelers, including those transiting Jakarta to onward destinations, have scrambled to rebook or reroute via alternative hubs in Singapore, Kuala Lumpur, or Denpasar.
Industry analysts cited in regional coverage suggest that the operational and financial impacts for airlines and airports will extend beyond Sunday, as carriers reposition aircraft, reassign crews, and clear backlogs in both passenger and cargo operations once the ash threat subsides.
What travelers should watch in the coming days
For passengers booked on upcoming flights between Bangkok and Jakarta, or using Jakarta as a transit point, publicly available airport and airline advisories remain the most important reference. While some services are expected to resume once ash concentrations fall below aviation safety thresholds, late schedule changes are still possible if volcanic activity fluctuates or wind patterns shift.
Travel specialists recommend that passengers monitor flight status frequently on the day of departure, ensure contact details are updated in airline reservations, and allow additional time at airports in case of congestion at check in and customer service counters. Those with tight connections may wish to proactively explore later onward segments or flexible tickets to reduce the risk of missed journeys.
The Anak Krakatau episode also reinforces the value of travel insurance products that explicitly cover weather and natural hazard disruptions, including volcanic ash. Policy terms vary widely, and publicly available consumer guidance in the region highlights the importance of checking coverage conditions for trip cancellation, delay, and accommodation costs before purchase.
As Anak Krakatau continues to be monitored, aviation stakeholders across Southeast Asia are likely to keep a close eye on ash advisories, given the volcano’s position near established air corridors. For now, Thai Airways’ targeted cancellations on the Bangkok–Jakarta route sit within a broader pattern of precautionary reductions across carriers serving Indonesia’s busiest air hub.
https://www.nationthailand.com/news/world/40070714
https://www.dw.com/en/indonesia-flights-canceled-as-anak-krakatau-volcano-erupts/a-79050871