Three international flights were diverted and several others were delayed after a dense fog enveloped the Indira Gandhi International Airport (IGIA) on Saturday.
According to the Met department officials, the runway visibility started dipping around 1.30am and by 2am it dropped to 200 metres, forcing the airport authorities to implement low visibility procedures (LVP).
"The visibility dropped to 100 metres and 150 metres for new and main runways at around 3.30 am," said a Met department official who doesn't wish to be named. "Three flights, two arriving from Dubai and one from Abu Dhabi, were diverted to Jaipur and Ahmedabad, as the visibility was poor," he added.
Around 50 flights, mostly scheduled to depart in the morning, were delayed by up to two hours due to fog and poor visibility. The LVP was initiated around 2am and was lifted at 10.25am.