At present, the outbreak of cold is being seen across the country. The hilly states of North India are experiencing severe cold due to heavy snowfall. On Monday night, a blanket of fog spread from UP, Bihar to Assam. Its biggest impact has been on air travel. Many airline companies including Indigo and SpiceJet have issued travel advisories. Airlines said that bad weather and fog caused disruption in flight operations.

Air India posted on social media platform The airline has requested passengers to keep checking their flight status.

Indigo airline issued advisory

Meanwhile, Indigo airline, which is struggling with the situation of massive flight cancellations earlier this month, also issued a travel advisory on Monday (December 29, 2025). The airline said that there is a possibility of fog formation late at night, which may persist till the next morning, which will reduce visibility at many airports.

Indigo said, ‘Looking at the forecast, there may be some impact on flight operations and there may be some delay due to changes in operations as per the circumstances. We remain vigilant and are constantly monitoring the weather, so that your journey can go as smoothly as possible.

The airline also said that traffic on the roads may also be affected in the early morning due to low visibility. Therefore, passengers are advised to leave extra time to reach the airport.

Keep checking flight status for new updates – IndiGo

Indigo had said in a post made a few hours ago that evening fog has started appearing again around Dehradun, due to which the speed of flights is slowing down. The airline said, ‘Our teams are assisting passengers at the airport and are continuously coordinating with the relevant authorities to normalize flights as soon as the situation becomes favorable. Please keep checking the status of your flights for new updates.

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Flight Delays: The effect of winter has increased significantly across the country and along with it dense fog, severe cold and low visibility have also come. The Meteorological Department has warned that the same conditions are likely to persist for the next few days. Flights are being delayed, canceled and even rescheduled. Let us know where air travel has slowed down.

Delhi was most affected

Most problems are being seen at Indira Gandhi International Airport. On December 21, due to dense fog and low visibility, about 110 flights were canceled and more than 370 flights were delayed. Along with this, the same situation remained on 22 December also. More than 150 flights were late in the morning.

Impact outside the capital also

This problem was not limited to Delhi only. Flights to and from Amritsar, Bengaluru, Hyderabad, Srinagar and Chennai were also affected due to bad weather. Let us tell you that the effect of fog is more severe in the northern areas, whereas in the southern cities, there are delays due to delay in aircraft rotation and congestion at major hubs.

Flights stopped in Srinagar due to snowfall

Due to bad weather and snowfall at Srinagar Airport, many flights were canceled directly. Mountainous weather conditions and low visibility sometimes make operations unsafe. This is the reason why airlines have to temporarily suspend services.

Meanwhile, Indigo has also canceled flights on many routes. Airlines also issued a travel advisory urging passengers to check real-time flight status before going to the airport. Along with this, Air India has also started its seasonal fog care initiative. Under this policy, passengers affected by fog related problems can reschedule or cancel their flights without any extra fees.

advice for travelers

Passengers are being advised to check flight status before leaving home, reach the airport on time and also keep in mind road delays due to fog.

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The continuously increasing cold and dense fog in Delhi is beginning to have an impact on air operations. Delhi Airport officials said that due to dense fog and low visibility at Indira Gandhi International Airport on Monday (December 15, 2025), there are a lot of problems in aircraft operations. Due to this, a total of 228 flights were cancelled, while five flights were diverted.

According to Delhi Airport officials, out of the total 228 flights that were cancelled, 131 flights were scheduled to depart from Delhi, while the destination of the other 97 flights was Delhi Airport i.e. they were included in the incoming flights, but on Monday (December 15) morning, visibility became very low due to dense fog in the national capital New Delhi. Due to this reason all flights had to be cancelled.

Due to low visibility, 228 flights (131 departures and 97 arrivals) have been canceled at Delhi Airport so far, and five flights have been diverted: Delhi Airport

— ANI (@ANI) December 15, 2025

Aircraft are being operated as per CAT-III rules

It is noteworthy that at present the flights at Delhi airport are being operated as per CAT-III rules. This rule allows aircraft to land in very low visibility conditions, but such cases often result in operational delays and even cancellation of flights.

Civil Aviation Ministry issued advisory

At the same time, keeping in mind the problems being faced by passengers due to the operation of aircraft, the Ministry of Civil Aviation issued a travel advisory on Monday (December 15, 2025). In this, the Ministry requested all the air passengers to check the latest updates regarding flight status from their airlines before leaving their homes for the airport.

Heavy Fog Alert for Northern India

Delhi (DEL) & other airports in Northern India are experiencing dense fog, severely affecting visibility.

For Passengers:
Before heading to the airport, please check the latest flight status with your airline.
Check flight information on the…

— MoCA_GoI (@MoCA_GoI) December 15, 2025

The ministry shared a post on the social media platform Along with this, it was emphasized that the safety of passengers should be given the highest priority.

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On the cancellation of IndiGo flights, aviation expert Subhash Goyal said, ‘To make air travel safe, pilots were demanding more rest hours in line with international rules. Therefore, after the court order, DGCA issued new rules. All airlines were instructed more than a year ago to recruit more pilots and staff and prepare for the new rules. All airlines like Akasa, SpiceJet, Air India and Air India Express followed this. However, IndiGo not only flouted the rules but also expanded its international route network and increased domestic flights without increasing the number of crew and pilots. As a result, when the government wanted to enforce the policy deadline, IndiGo stopped most of its flights instead of reducing some of its flights. This caused complete anarchy.

#WATCH Delhi: On IndiGo flight cancellations, Aviation expert, Subhash Goyal says, “To make air travel safer, pilots were demanding more rest hours in line with international regulations. Therefore, the DGCA issued new regulations, following court orders. All airlines were… pic.twitter.com/hm39HmqLPB

— ANI (@ANI) December 5, 2025

Air traffic controllers could have prevented the major system failure that occurred on Friday at Delhi’s Indira Gandhi International Airport. The ATC Guild of India says that they had warned the Airport Authority of India (AAI) in July itself about the flaws in the system and the need for upgrades, but it was not heeded.

Warning was given in July
The ATC Guild says that they had given written information to AAI in July about the need for system upgrade. He alleges that despite repeated requests, no concrete action was taken on his suggestions.

Letter written to MPs after Ahmedabad accident
The Guild said that on July 8, they had also written a letter to the MPs. This letter was sent after the accident of Air India Boeing 787 Dreamliner in Ahmedabad, in which 260 people died. It was said in the letter that it is very important to review and upgrade the air navigation system from time to time.

ATC Guild wants a system like international standards
ATC Guild says that India’s automation system should be like Europe’s Eurocontrol and America’s FAA. The air traffic control system there has features like modern technology, AI-based threat identification and real-time data sharing.

Security concerns raised several times
The guild alleges that they informed AAI several times about serious security concerns, but no concrete action has been taken till now. On Friday, there was a technical glitch in the air traffic control server of Delhi Airport. The glitch in AMSS (Automatic Message Switching System) disrupted flight messaging and affected more than 800 flights.

Flights were affected for several hours
After the AMSS system failure, many flights were delayed and many had to be cancelled. Its impact reached international flights. Delhi airport operator DIAL said that flight operations became normal in the afternoon, but passengers have been advised to keep in touch with their airlines. At the same time, AAI said that the technical glitch in AMSS has been fixed, due to which there was a delay in processing of flight plan messages.

After the technical glitch in flight operations in Delhi, now a similar problem has come to light in Nepal. All incoming and outgoing flights have been stopped after a technical fault in the runway lights at Nepal’s Tribhuvan International Airport. Airport officials said that flight operations will remain closed until the problem is resolved.

Both domestic and international flights affected
According to officials, both domestic and international flights have been stopped at Nepal’s Tribhuvan International Airport due to a technical problem with the runway lights. Keeping security in mind, all the planes have been grounded.

Technical team deployed on site
Technical teams have been deployed at the airport to investigate and resolve the problem. Officials said efforts are on to restore normal flight operations as soon as possible. Airport spokesperson Renji Sherpa told ANI that there was a problem with the runway’s airfield lighting system. He said, at least five flights are on hold at present. All domestic and international arriving and departing flights are facing delays. The problem was discovered at 5:30 pm (local time).

All flight movement in Nepal’s Tribhuvan International Airport halted following a technical glitch in the lights along the runway, according to airport officials.

More details awaited.

— ANI (@ANI) November 8, 2025

Nepal’s largest airport affected
Tribhuvan International Airport is the main aviation hub of Nepal and most of the country’s air traffic operates from here. Due to malfunction in runway lighting, the flight system of the entire country has been affected.

Flights were disrupted in India also a day earlier
This incident has come to light a day after a major technical glitch disrupted flight operations at India’s Indira Gandhi International Airport (IGI) in Delhi on Friday, affecting air traffic across the country.

Operation impaired due to AMSS system failure
Airport officials said that the Automatic Message Switching System (AMSS), a vital system related to the flight planning process of air traffic control, had failed. However, now this problem has been completely rectified and flights became normal on Saturday.

There was chaos at Indira Gandhi International Airport (IGI Airport) in the country’s capital Delhi on Friday (November 7) when a sudden technical glitch in the air navigation system affected the operations of the entire airport. Due to this disturbance at IGI, which is counted among the busiest airports in the world, about 800 flights were delayed and thousands of passengers had to wait at the terminal for hours.

According to sources, this technical flaw in the Air Traffic Control (ATC) system was so serious that both flight landing and takeoff were affected for some time. Many planes were kept in holding patterns in the air, while some had to be diverted to nearby airports. The problem was resolved at around 9 pm, after which flight movements gradually started becoming normal. It is a matter of relief that there was no major accident with any aircraft.

Passengers expressed displeasure

Expressing their displeasure, the passengers said that they were not informed about the situation for several hours. At the same time, passengers of many domestic and international flights were stopped at the gate as runway operations were temporarily stopped.

Where did the problem come from?

The Airport Authority and DGCA immediately deployed technical teams to handle the situation. The failure was related to the navigation data server, causing disruption in communications and navigation systems. During this time the airport staff tried to solve the problems of the passengers.

Advisory issued at around 11:55 pm

In an advisory issued at around 11:55 pm, Delhi Airport Management said, “All flight operations have now become normal. Passengers can travel without any worries.”

As per the passenger advisory issued at 11:55 hours by the IGI Airport, all flight operations are normal at Delhi Airport. pic.twitter.com/UvSasSiqAj

— ANI (@ANI) November 8, 2025

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The technical problem related to Air Traffic Control (ATC) at Delhi’s Indira Gandhi International Airport has almost been resolved and due to this the operation of flights is also becoming normal. Delhi Airport Authority shared a big update on this matter on Saturday (8 November). The airport issued an advisory for passengers and said that the situation is now returning to normal.

Delhi Airport in its advisory said, “Automatic Message Switching System (AMS) is used to assist Air Traffic Control in its flight planning process.AMSS) The technical problem affecting the system is gradually improving. Airline operations are returning to normal at Delhi airport and all concerned authorities are working diligently to minimize any inconvenience. “Passengers are advised to stay in touch with their airlines for latest flight information.”

More than 800 flights were affected

More than 800 flights were affected at Delhi Airport from Thursday night to Friday morning. AMSS was closed due to technical problem, due to which there was a lot of difficulty in flight operations. AMSS means Automatic Message Switching System. It plays the biggest role in the operation of flights, but due to technical problem it was closed automatically. Thousands of passengers had to face problems due to this problem.

Delhi Airport issues advisory, “The technical issue which affected the Automatic Message Switching System (AMSS), that supports the Air Traffic Control flight planning process, is gradually improving. Airline operations at Delhi Airport are returning to normal, and all concerned… pic.twitter.com/eAgBf0jgvJ

— ANI (@ANI) November 8, 2025

Indira Gandhi Airport is one of the busiest airports.

Indira Gandhi Airport is one of the busiest airports in the country. About 1500 flights operate from here every day. Due to technical problems, the average delay of planes till 9 am on Friday was about 45 minutes. However, now the situation is close to normal.

Flight operations were severely affected on Friday after a major technical glitch in the AMSS system at Delhi’s Indira Gandhi International Airport, due to which more than 200 flights were delayed. Earlier it was told that this has affected Mumbai Airport also, however later Mumbai Airport Authority said that advisory was issued to the passengers by mistake.

AMSS failed at Delhi airport

As soon as the AMSS system crashed at Delhi Airport, the air traffic control had to leave the automatic mode and work manually. Due to this, the data of each flight had to be processed manually. Distance calculations of the planes also had to be done manually and coordination had to be done through voice communication, due to which the operation of flights became much slower than usual.

Delay of more than an hour at Delhi airport

At present, there is an average delay of 62 minutes i.e. more than an hour in the departure of flights at Delhi Airport. According to data from Flightradar24, this delay has increased after a technical glitch in the air traffic control system. Airports Authority of India (AAI) has said that its teams are busy fixing the AMSS (Automatic Message Switching System), which supports ATC data. There are approximately 1,500 flight movements daily at Delhi Airport. Under normal conditions, 60-70 flights take off and land per hour. In such a situation, due to automation failure, the backlog of flights increased rapidly and the delay extended for several hours, the effect of which was seen in the entire network.

Mumbai Airport issued clarification

Mumbai Airport (MIAL) said that the advisory issued earlier was issued by mistake and was a human error. The airport clarified that all flight operations here are running completely normal and smoothly.

What is AMSS system?

AMSS is the system that sends flight plans, weather information, and other technical data between ATC and airlines. Once it fails, controllers have to enter all the data manually, which makes operations extremely slow and significantly affects flight time.

AAI issued advisory

Airport Authority of India issued a statement saying that due to AMSS malfunction at Delhi Airport, flight operations are getting delayed and the controllers are processing all the plans manually. Technical teams are continuously working on restoring the system. Passengers have been advised to stay in touch with their airlines and keep checking updated schedules.

Advisory issued for the convenience of passengers

Authorities have requested passengers to keep checking flight information from their respective airlines, be prepared for possible delays and follow instructions given at the airport. The situation is being monitored in both Delhi and Mumbai so that the system can be normalized as soon as possible.

On Tuesday (28 October), a bus of Air India’s ground handling service provider company AI SATS suddenly caught fire at Terminal-3 (T3) of Delhi Airport. The incident occurred near bay number 32, which was just a few meters away from the plane.

The special thing is that there were no passengers present in the bus at that time, due to which a major accident was averted. As soon as the fire broke out, fire brigade personnel reached the spot and brought the fire under control. There has been no report of anyone being injured or damage to planes parked nearby. Airport officials said that investigation into the cause of the fire has been started. At the same time, the official statement from Air India is awaited.

#ChhathPuja
Bus fire at Delhi Airport pic.twitter.com/t1wyRFkbGf

— AIRCRAFT MECHANIC (@GOD3636) October 28, 2025