Flight operations at the Indira Gandhi International Airport in Delhi remained largely normal today even as the airport witnessed fog.

"Operations are largely normal. However, three flights were cancelled and seven were delayed due to fog, bad weather at destination or operational reasons," airport sources said. Though there was shallow fog in the morning, it had no significant impact on airport operations. Dense fog descended on the airport around 1.30 am, leading to a drop in visibility to 75 metres at the third runway and hovered around 150 metres till 3 am.

During this period general visibility dropped to below 25 metres. The visibility at the main runway remained between 150 and 225 metres through the night and in the morning it increased to 1,200 metres, they said, adding so there was virtually no affect on flight movement. Yesterday, around 140 flights were affected after dense fog enveloped the airport.