"The visibility has been reduced to below 800 meters, preventing any plane from landing," the ministrys Spokesman J.A. Barata said in a press statement.
Forest fires producing the smog have flared up on the islands of Sumatra, Kalimantan, Java and Sulawesi during the current El Nino-induced drought.
The smog has caused a number of flight delays and cancellations at 16 airports, he added.
In Kalimantan, the affected airports are the Melalan Melak Airport in Kutai (East Kalimantan Province), the Syansyudin Noor Airport in Banjarmasin (South Kalimantan), the Beringin Airport in Muara Teweh, the Iskandar Airport in Pangkalan Bun and the Haji Asan Airport in Sampit (Central Kalimantan), along with the Supadio Airport in Kubu Raya, the Pangsuma Airport in Putussibau, the Susilo Airport in Sintang, the Rahadi Usman Airport in Ketapang, and the Tjilik Riwut Airport in Pontianak (West Kalimantan), and the Atty Besing Airport in Malinau (East Kalimantan).
In Sumatra, the smog-hit airports include Ferdinand Lumban Tobing in Sibolga, and the Silangit Airport in North Tapanuli (North Sumatra), the Sultan Thaha Airport in Jambi, and the Sultan Syarif Kasim II Airport in Pekanbaru (Riau), and the Depati Amir Airport in Pangkal Pinang, Bangka Belitung.(*)