NEW DELHI – Flight operations across several parts of northern and eastern India, including Delhi, were affected on Jan 1 as dense fog engulfed large swathes of the region, sharply reducing visibility and prompting airlines to issue advisories for passengers.

Low visibility conditions led to disruptions at multiple airports, including those in Delhi, Ranchi, Bhubaneswar and Guwahati, with airlines cautioning travellers to remain alert and check flight updates to avoid inconvenience.