Technical glitch at Delhi airport air traffic system resolved, delays persist
A technical malfunction in the Automatic Message Switching System (AMSS) at Delhi's Indira Gandhi International Airport caused delays for over 800 flights starting Thursday evening. The system was restored late Friday, but a significant backlog means some delays continue. Airlines manually generated flight plans to maintain operations during the outage. The glitch impacted both domestic and international flights.
On November 6–7, 2025, a technical glitch in the IP-based Automatic Message Switching System (AMSS), vital for generating flight plans at Delhi's Indira Gandhi International Airport, led to delays affecting more than 800 flights. The system failure began around 6 p.m. on Thursday and disrupted departures and arrivals, causing an average departure delay of approximately 50 to 60 minutes. Airlines such as IndiGo, Air India, SpiceJet, Air India Express, and others were affected, including international flights to Rome and London experiencing significant delays. To mitigate the impact, some airlines deputed staff to manually create flight plans. The Airports Authority of India (AAI) worked with technical teams and the system manufacturer to restore AMSS functionality, which was achieved late Friday. Despite the restoration, the AAI cautioned that normal functioning would take time due to the backlog. Delhi airport, the ninth busiest worldwide in 2024 with around 78 million passengers, experienced operational disruptions with hundreds of flights delayed and some cancellations. This incident followed a recent ransomware attack affecting European airports, highlighting vulnerabilities in air traffic communication systems. AAI continues to monitor the system to ensure stability and gradual normalization of flight operations.
