New Delhi, Jan. 3: Flight operations at airports in Delhi were disrupted by fog on Saturday morning.

Nearly 20 flights were delayed up to up to three hours and 15 others were cancelled at the Indira Gandhi Airport.

The General Visibility dipped below normal resulting in the cancellation of early morning flights to Chennai, Mumbai, Hyderabad, Jaipur and Kochi.

Visibility dropped to below 50 metres, while runaway visibility dipped to around 100 metres.

The minimum visibility requirement for aircrafts to take off is 150 metres.

Besides a few International flights, no plane landed or took off this morning.

So far, around 75 flights have been cancelled, while more than 500 have been delayed. The fog has been affecting New Delhi's flight movements since Monday. (ANI)