"Though there was shallow fog, the runway visibility was around 1,000 metres which was good enough for normal flight operations," an airport official said, adding all domestic and international flights were operating as per schedule.
Heavy fog has played havoc with flight operations this season.
"Breaking the record of January 2003 when IGI airport witnessed around 168 hours of dense fog, this year it has witnessed a total of 172 hours of dense fog," R K Jenamani, Director in charge of Airport Met Department, said.
"If this condition prevails, it could easily break the record of December 1998, when the airport witnessed 179 hours of dense fog in one month during a season," he said.
In the past ten days, about 190 flights have been cancelled while around 1,200 have been delayed.
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