Dense fog affected the flights operations at the Indira Gandhi International Airport in the national capital Monday morning. According to the Airport official, three flights were diverted, some were delayed while no cancellation was reported.The runway visibility dropped to 75 metres due to which authorities had to implement low visibility procedures for the operations of flights.According to the MET department, the minimum temperature was recorded 8.2 degree Celsius, a degree below normal while the maximum settled to 22.4 degree Celsius on Monday.