After three days of disruption of flights due to dense fog, air traffic operated smoothly on Monday morning even as Delhities woke up to a chilly morning. Airport sources said that barring a period from 2339 hrs last night to 0136 hrs this morning, when the airport declared Low Visibility Procedure (LVP), flights operated smoothly. During the LVP period, international flights landed but the national carrier, which is not adaptable to LVP, could not land. Bureau Report