'Gradually Improving': Delhi Airport Says Flight Operations Returning To Normal After ATC Glitch

Last Updated:November 08, 2025, 07:36 IST

Flight operations at Delhi airport are returning to normal after a major disruption caused by a technical glitch in the Air Traffic Control’s Automatic Message Switching System.

People wait outside the arrivals’ exit at the Indira Gandhi International (IGI) Airport (Photo: PTI)

Flight operations at Delhi’s Indira Gandhi International Airport (IGIA) are steadily returning to normal after a major disruption caused by a technical glitch in the Automatic Message Switching System (AMSS), which supports Air Traffic Control (ATC) flight planning.

In an update posted on X on Saturday morning, the Delhi airport mentioned the technical issue that had impacted the AMSS was “gradually improving," with airline operations “returning to normal."

The airport assured that all concerned authorities were “working diligently to minimise any inconvenience caused" and advised passengers to stay in touch with their respective airlines for the latest flight updates.

The clarification came a day after a large-scale outage in the AMSS system, a crucial backbone for ATC data, led to widespread delays and congestion at the country’s busiest airport.

According to news agency ANI, the temporary AMSS outage that affected ATC operations has now been fully resolved, and normal flight services are being progressively restored not only at Delhi but also at several other airports in northern India.

IndiGo Airlines, in a statement shared on X, said it was “pleased to share that the temporary AMSS system outage affecting Air Traffic Control has now been resolved, and normal operations are being progressively restored at Delhi Airport and other impacted airports in the northern region."

The airline expressed appreciation for the swift efforts of the airport and ATC authorities in resolving the issue.

“As flight operations stabilise, delays and terminal-side congestion may continue for some time, and we thank you for bearing with us during this transition back to normalcy," IndiGo said, adding that its on-ground teams remained available to assist passengers.

The carrier also urged passengers to check their latest flight status before travelling and assured that it was working to ensure “a smooth and pleasant journey once again."

The temporary outage, which began on Friday, led to heavy disruption in flight schedules across airlines operating from Delhi.

At least 800 flights were delayed and around 20 were cancelled, as per airport and aviation sources.

The Airports Authority of India (AAI) later confirmed that the issue had been detected in the IP-based AMSS system on November 6, prompting manual processing of flight plans to keep operations running safely.

A team from Electronics Corporation of India Ltd (ECIL) was called in from Hyderabad to assist in restoring the system, which was brought back online late Friday night.

While the AMSS system is now operational, officials said residual delays might persist for a short while as backlogs are cleared and automated operations fully stabilise.

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Vani Mehrotra

Vani Mehrotra is the Deputy News Editor at News18.com. She has nearly 10 years of experience in both national and international news and has previously worked on multiple desks.

Vani Mehrotra is the Deputy News Editor at News18.com. She has nearly 10 years of experience in both national and international news and has previously worked on multiple desks.

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