Delhi Airport 'up & functional' after technical glitch delays 800 flights, Mumbai, Lucknow & others affected

The Airport Authority of India (AAI) on Friday evening said the technical issue at the Delhi Airport, which caused delays to hundreds of flights across India, has been resolved.  In a post on X, formerly known as Twitter, the AAI provided a detailed account of what happened, adding that there may still be flight delays to and from Delhi Airport due to backlogs.

“The AMSS systems are up and functional now. Due to some backlogs, there may be some delays in the normal functioning of automated operations, but the situation will be normal soon,” the AAI said in the post.

Hundreds of flights were delayed, and thousands of passengers have been affected by the technical glitch since Friday morning. The technical issue affected the Automatic Message Switching System (AMSS) of the Air Traffic Control (ATC).

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“AAI at Indira Gandhi International Airport addressed a technical issue in the Automatic Message Switching System (AMSS), which caused delays in processing flight plan messages. The issue was detected on November 6, 2025, in the IP-based AMSS system,” the Airports Authority said.

Update on Technical Fault at IGI Airport, New Delhi

NEW DELHI, November 7, 2025 - AAI at Indira Gandhi International Airport addressed a technical issue in the Automatic Message Switching System (AMSS), which caused delays in processing flight plan messages. The issue was…

— Airports Authority of India (@AAI_Official) November 7, 2025

“Immediately, the review meeting was conducted by the Secretary, MoCA, with Chairman AAI, Member ANS, and other officials, and necessary directions were given to address the issues,” it added. The AAI maintained that necessary measures were taken to mitigate the effect of the glitch at the Delhi Airport.

“The OEM was engaged, and additional staff were deployed to manually process Flight Plans for the Air Traffic Control system to ensure uninterrupted and safe air traffic operations immediately. A team of ECIL officials and AAI personnel is still on site,” it furthered.

Over 800 flights were delayed due to the glitch

While the AAI confirmed that the issue had been resolved by Friday evening, over 800 flights were delayed due to the technical glitch that affected the ATC, PTI reported, quoting sources. This included both domestic and international flights.

All airlines across the country’s busiest airport were affected as a result of the technical glitch. “All airline operations at Delhi Airport are currently delayed. Concerned authorities are working on resolving the issue at the earliest,” Delhi Airport operator DIAL said in a statement on X, which was last posted at 8:12 pm.

Not only this, the AMSS failure at Delhi Airport spilled over to other airports across the country as well. Mumbai, Jaipur, Lucknow, Varanasi, and other major international airports also saw delays in flights connected to IGI Airport.

According to a report by News18, at least 15 flights in Jaipur were delayed due to the Delhi Airport issue, prompting airports across the country to issue advisories. Long queues were seen outside the boarding gates as hundreds of passengers waited inside the airport terminals to get an update on their journey.