AAI confirmed that all systems affected by technical glitches have been restored.
Over 800 flights were delayed nationwide after a major ATC system glitch at Delhi’s IGI Airport.
Automatic Message Switching System (AMSS) failure forced controllers to process flight plans manually.
Disruptions at Delhi are spilling over to Mumbai, Jaipur, Lucknow, and Varanasi, due to delayed originating flights.
AAI and DIAL technical teams are working to restore the system; no similar issue reported elsewhere.
Airlines including Air India, IndiGo, SpiceJet, and Akasa Air have issued passenger advisories.
Passengers have been advised to check flight updates regularly before arriving at airports.
The glitch has led to longer wait times both at terminals and onboard aircraft.
New Delhi: After a major technical glitch at Delhi’s Air Traffic Control (ATC) on Friday, the Airports Authority of India (AAI) told media that all affected systems have now been restored and are operating normally.
The AAI added that while the flight delay backlog may take some time to clear, the systems that earlier caused widespread disruption to air operations across India are now fully functional.
“The Airports Authority of India successfully addressed a technical issue in the Automatic Message Switching System at Indira Gandhi International Airport, New Delhi, which had temporarily affected the processing of flight plan messages from 6th November, 2025," it said in an official statement.
The incident at Indira Gandhi International Airport (IGIA), one of the country’s busiest hubs, triggered a chain reaction that affected over 800 flight schedules nationwide.
The problem reportedly stemmed from a failure in the Automatic Message Switching System (AMSS), which manages crucial Air Traffic Control (ATC) data and flight plans.
“Due to a technical issue with the Air Traffic Control (ATC) system, flight operations at IGIA (Indira Gandhi International Airport) are experiencing delays. Their team is actively working with all stakeholders including DIAL (Delhi International Airport Limited) to resolve it at the earliest," read a passenger advisory.
The AMSS failure has begun to affect operations at Mumbai, Jaipur, Lucknow, Varanasi, and other major airports, as flights originating from Delhi to these destinations are delayed.
However, the AAI clarified that no similar technical issue has been reported at any other airport so far.
Airlines issued advisories asking passengers to stay updated on their flight status before reaching the airport.
“A technical issue with the ATC system in Delhi is impacting flight operations across all airlines, leading to delays and longer wait times. We regret the inconvenience caused by this unforeseen disruption," Air India said in a statement, adding that on-ground staff are assisting affected passengers.
Low-cost carriers IndiGo, SpiceJet, and Akasa Air also reported delays, particularly on northern routes.
“While the authorities work to restore full system functionality, our priority is to support you with timely updates and assistance across all airport touchpoints. Our teams remain available and are doing their utmost to ensure your journey remains as smooth as possible," said IndiGo.