Flight operations at the Indira Gandhi International Airport in New Delhi were disrupted due to dense fog, affecting the movement of about 20 flights this morning.
"The early morning fog has disrupted about 20 domestic and international flights," airport sources said, adding one flight was cancelled.
The fog started to engulf the airport around 3 am when the visibility began to deteriorate.
The visibility dropped to 125 metres for main runway while 100 metres for new one, and did not improve for next two to three hours, affecting the movement of flights.
Fog has been disrupting flight movement at the IGI airport this winter, with over 1,200 being delayed and around 150 being cancelled.