Wildfire Smoke Disrupts Flights at Airports Across Kalimantan

Wildfire smoke from expanding forest and land fires across Kalimantan is beginning to disrupt commercial flights at several airports, with delays, diversions and heightened visibility restrictions affecting passengers in West and East Kalimantan.

Smoke Triggers Delays at Supadio International Airport

Flight operations at Supadio International Airport serving Pontianak in West Kalimantan have been among the hardest hit, as persistent smoke has reduced visibility below operational thresholds on multiple mornings this week. Publicly available information from airport operators and local coverage indicates that from 18 to 21 August 2026, at least 21 morning flights experienced delays, with visibility in some periods reported at under 1,000 meters.

Reports from regional outlets describe passengers waiting at departure gates while airlines adjusted schedules in response to rapidly changing conditions. Data compiled for 18 to 20 August shows at least 15 delayed flights, followed by a further wave of disruption on 21 August as smoke thickened over the airport area.

According to English language coverage citing Supadio’s management, affected services have included both domestic routes linking Pontianak with Jakarta, Surabaya and Ketapang, and regional traffic. One Jakarta bound service was reported to have executed a go around due to poor visibility before being diverted to Batam, underscoring the operational challenges posed by the haze.

Available reports also indicate that, despite the disruption, cancellations have so far been limited, with airport management and airlines largely opting for delays and diversions while waiting for conditions to meet minimum safety standards.

New Airport Closures and Wider Network Impacts

Disruption has not been confined to Pontianak. Regional news agencies and wire services report that all flights at Singkawang Airport in West Kalimantan were cancelled at least temporarily as smoke and haze reduced visibility beyond safe landing and take off limits. Coverage indicates that this smaller airport, which handles domestic services, opted to suspend operations while conditions remained below regulated minima.

In East Kalimantan, published reports from Kutai Barat point to delays of up to around 90 minutes at Melalan Airport in Melak as smoke from nearby land and forest fires affected morning and late afternoon departures. Airport managers cited reduced visibility and a decision to hold aircraft on the ground until conditions improved, reflecting a cautious approach mirrored across the region.

The combination of full cancellations at Singkawang, repeated delays at Supadio and schedule disruptions at Melalan highlights how quickly wildfire smoke can affect a dispersed network of secondary and regional airports. While the majority of major hubs on the island remained operational as of the weekend, the pattern of localized disruption suggests that travelers across Kalimantan face a heightened risk of last minute schedule changes.

Transport ministry statements referenced in local and international coverage confirm that aviation authorities are monitoring several airports across Kalimantan for smoke related impacts, with the potential for additional measures if fire activity intensifies or prevailing winds shift.

Authorities Emphasize Visibility and Safety Thresholds

Public information from Indonesia’s Directorate General of Civil Aviation highlights visibility as a key factor in determining whether flights can operate during haze events. Guidance disseminated on 21 August stresses that when reported visibility falls below the minimum thresholds prescribed for a particular runway and aircraft category, departures and arrivals may be delayed, diverted or in some cases cancelled entirely.

According to these updates, aviation authorities are working with airport operators, air navigation services and meteorological agencies to track the movement of smoke plumes over Kalimantan’s airspace. Real time assessments of runway visual range, ceiling height and wind conditions help determine when aircraft can safely land or take off.

Reports from Supadio and Melalan airports indicate that operators are using rolling assessments, frequently updating pilots on visibility readings and allowing departures once conditions rise above prescribed limits. Air navigation providers are simultaneously managing altered flight paths and holding patterns where necessary to maintain safe separation between aircraft in hazy conditions.

Public communications from the transport ministry emphasize that safety criteria take precedence over schedule reliability in periods of degraded visibility, with operators instructed to prioritize conservative decision making until smoke concentrations ease.

Mixed Conditions Across Kalimantan’s Major Hubs

While parts of West and East Kalimantan have faced visible disruptions, conditions at some larger airports remain relatively stable. Published coverage from Samarinda notes that operations at Aji Pangeran Tumenggung Pranoto Airport in East Kalimantan were still described as normal through 21 August, with passenger numbers and daily flight movements reported as steady and no smoke related visibility issues recorded.

This contrast reflects the patchy nature of wildfire smoke, which can severely affect one area while leaving another only mildly impacted, depending on wind direction, local fire activity and topography. In Kalimantan’s case, several active fire clusters near peatlands and agricultural concessions in West Kalimantan have contributed to heavier haze there compared with some eastern corridors.

For airlines and airports, this uneven pattern complicates planning, as crews and aircraft may originate from relatively clear locations but face constraints at destination airports where smoke suddenly thickens. Industry data and media reports suggest that morning flights are particularly vulnerable, as calmer overnight conditions tend to trap smoke near the surface before daytime heating helps disperse it.

Travelers flying into or out of Kalimantan in the coming days are being advised, through airline and airport public channels, to monitor booking apps and flight information screens closely and to allow additional time for check in and connections in case of unexpected delays.

Travel Advice for Passengers Amid Ongoing Fires

For passengers planning trips to, from or within Kalimantan, the evolving situation requires flexibility. Airlines are updating schedules as visibility reports change, and some carriers are offering rebooking options when flights face extended delays or diversions linked to smoke conditions, according to local media coverage from affected airports.

Travel industry guidance recommends that passengers check the status of their flight on official airline websites or apps before leaving for the airport, particularly for morning departures from Pontianak, Singkawang or smaller East Kalimantan airfields. Where possible, travelers are also encouraged to keep essential items such as medications and important documents in carry on bags, in case they are unexpectedly required to stay overnight due to a diversion.

Public health agencies in Indonesia routinely advise the use of masks and limiting outdoor exposure during periods of dense haze. While airport terminals themselves are generally enclosed and filtered, travelers passing through affected cities may wish to follow local health guidance, especially those with respiratory conditions.

With the wildfire season still underway across parts of Kalimantan, aviation and meteorological agencies continue to monitor conditions. If fire activity or smoke levels rise further, additional airports on the island could experience short notice operational constraints, prolonging a period of travel uncertainty for residents and visitors alike.

Wildfires smoke delays 21 flights at Supadio Airport - ANTARA

Haze from forest and land fires disrupts flights at Supadio - ANTARA Foto

Haze: All flights cancelled at Singkawang Airport - Bernama

Monitoring wildfire smoke impacts on aviation - Indonesian Transport Ministry

Wildfire haze delays flights at Melalan Airport, Kutai Barat - detikKalimantan