Smog Crisis Deepens: Why IndiGo Issued Advisories for Delhi, North India Flights

Dense winter fog conditions and severe pollution have returned to North India. The Delhi air quality crisis worsened on Saturday morning. Air Quality Index (AQI) readings exceeded 300 in many areas. This level places the air quality back into the 'Very Poor' category.

IndiGo Issues Travel Advisory

Following the thick smog, IndiGo issued a travel advisory for several northern and eastern cities. The advisory specifically targeted flights at Amritsar, Chandigarh, and Ranchi airports. The airline warned of potential low visibility flight delays and changes to the flight schedule. IndiGo posted the advisory on X, noting operations may be slower than usual. The airline stressed that safety and compliance with visibility requirements are the top priority.

IndiGo's ground teams are working to assist passengers. They urged travelers to remain patient until weather conditions improve.

Air Quality and Regulatory Response

The air quality spiked to the 'Severe' category (AQI 429) in several locations. According to the Central Pollution Control Board (CPCB), an AQI between 301 and 400 is 'Very Poor.' Readings between 401 and 500 are classified as 'Severe.'

Specific pollution hotspots recorded alarming levels. Anand Vihar and Akshardham both registered an AQI of 410. India Gate stood at 303, while the ITO area reached 379. Authorities are monitoring pollution levels closely. They are also enforcing measures like the 'No PUC, No Fuel' rule. Earlier, the government lifted Stage 4 of the Graded Response Action Plan (GRAP). This revocation occurred despite the Air Quality Index remaining in the 'Very Poor' range.

Aviation Industry Impact

Low visibility flight delays are a routine challenge during the winter fog season. The Directorate General of Civil Aviation (DGCA) designates December 10 to February 10 as the winter fog window.

During this time, airports must implement Low Visibility Procedures (LVP). Operations at major hubs like Delhi often shift to Category III (CAT III) conditions. This system allows landings in dense fog. However, not all aircraft or pilots are certified for these conditions. This leads to diversions, cancellations, and widespread flight schedule changes.

Industry bodies like the International Air Transport Association (IATA) emphasize operational resilience. They note that weather-related disruptions cascade across the network. Passengers must actively check their flight status. This is crucial for managing expectations and planning airport travel. The commercial aviation news cycle is heavily influenced by these seasonal weather events. For more updates on global air travel, visit our aviation news at flying.flights.