As many as 500 flights, both domestic and international, flying into and out of the IGI Airport have been affected since Sunday, when the city witnessed the worst fog of the season.
Today alone, some six flights were cancelled and over 60 delayed due to fog that engulfed the airport. Nearly 40 domestic and 26 international flights were among those delayed.
Sinha also invited suggestions to improve the system performance.
His remarks came in response to a tweet by Sanjiv Kapoor, who is the Chief Strategy and Commercial officer of Tata-SIA run Vistara airline, on the "terrible" flight delays at Delhi airport.
More From This Section
Significantly, both private airport operator and airlines had claimed full preparedness to carry out flight operations on their parts ahead of the fog season.
According to the India Meteorological Department (IMD), general visibility improved to 200 metres at the Delhi airport as compared to zero metres over the past two days.
Take-offs at Delhi airport require a minimum RVR of 125 metres and landings can take place with a minimum RVR of 50 metres.
"Operations this morning are normal thus far as visibility at DEL is within minimums, but may change at short notice," Vistara airline informed passengers on Twitter. The airline is also allowing passengers to change or cancel their flight bookings without any penalty.
"Dear Mr Sinha-Terrible delays yesterday and the day before due to fog on DEL. Entire system thrown out of whack," Kapoor had tweeted earlier.
"Dear Mr. Sinha, really appreciate your response. Some observations and ideas on potential airport/ATC SOP changes to reduce hours spnt on board by pax and crew awaiting departure turn at times like this, which we will share via email. Thanks for your support. Regards (sic)," Kapoor said in another tweet.