Delhi airport warns of delays as dense fog disrupts flight operations

Passengers warned of flight delays at Delhi airport as dense fog triggers CAT III operations; several airlines issue travel advisories

As dense fog and a cold wave continue to blanket the national capital, Delhi’s Indira Gandhi International (IGI) Airport issued a passenger advisory on Friday, warning of disruptions. The haze significantly reduced visibility, prompting CAT III operations that may delay flights.

 

The advisory stated, “Dense fog has led to CAT III operations at the airport, resulting in possible delays and disruptions.” Passengers are urged to check with their airlines for real-time flight updates. “Our on-ground teams are working closely with all stakeholders to assist passengers and provide support across all terminals. We sincerely regret any inconvenience caused and appreciate your understanding,” the advisory added.

 

 

A separate advisory issued at 4:00 am reiterated, “Due to dense fog, flight operations are currently under CAT III conditions, resulting in flight disruptions. Our on-ground officials are coordinating with stakeholders to assist passengers across terminals. For the latest flight status, please contact your respective airlines," said the airport on X. 

Update issued at 0700 hours.  Kind attention to all flyers!#Fog #FogAlert #DelhiAirport pic.twitter.com/85lt0GvEFQ

— Delhi Airport (@DelhiAirport) December 19, 2025

What guidance has the Ministry of Civil Aviation issued?

 

The Ministry of Civil Aviation (MoCA) issued a heavy fog alert for northern India, urging passengers to check flight status before travelling and allow extra travel time. In a post on X, MoCA stated: “The ongoing fog conditions in Northern India are impacting airport operations. Passengers are advised to stay in touch with their airlines for real-time flight updates, regularly check official airline and airport websites or apps, and plan their journeys with additional travel time. Passenger facilitation teams are deployed across airports to provide necessary assistance.”

Which airlines have issued advisories?

 

IndiGo, Air India, Air India Express and SpiceJet have all issued travel advisories. IndiGo, taking to its official X account, stated that early morning fog in Delhi and northern India is affecting visibility and flight operations. Passengers travelling in the early hours may face delays or revised timings and are advised to check flight status before leaving for the airport.

 

Airlines emphasised that teams are monitoring weather conditions and coordinating with air traffic authorities to minimise disruptions and provide support. 

Travel Advisory#Delhi and several parts of northern/eastern India are currently experiencing reduced visibility due to fog, impacting flight schedules.  Customers are advised to check their flight status before heading to the airport https://t.co/IEBbuCsa3e and allow extra…

— IndiGo (@IndiGo6E) December 19, 2025 

#WeatherUpdate: Due to bad weather at Delhi (poor visibility) and Dubai (thunderstorm with rain), all departures/arrivals and their consequential flights may be affected. Passengers are requested to keep a check on their flight status via https://t.co/2wynECZugy.

— SpiceJet (@flyspicejet) December 18, 2025

What are CAT III operations?

 

CAT III (Category III) operations are advanced Instrument Landing System (ILS) procedures that allow aircraft to land in extremely low visibility due to fog or smog. However, not every aircraft or pilot is certified for CAT III landings, which can result in delays until conditions improve, according to a report by Mint.

 

Currently, six airports in India have runways certified for CAT III operations: Delhi, Lucknow, Jaipur, Amritsar, Bengaluru and Kolkata.