As per reports, almost 12 flights were diverted and almost 30 delayed in observation of the smoke produced because of the ritualistic burning of old articles on account of festive celebrations, which has made a cause of a dip in visibility.
Earlier, 18 arriving flights were diverted to Bengaluru and Hyderabad airports.
Bhogi, celebrated ahead of the Tamil harvest festival Pongal which will be celebrated tomorrow (Jan. 14), involves burning of old articles in a symbolic gesture of bidding adieu to the old and welcoming the new.
Airport officials said over 40 worldwide and domestic services suffered cancellation and delay starting around 4 am today, with flight operations finally resuming around 9:30 am when the first service was operated to Mumbai.
Another SriLankan flight bound for Colombo was also delayed.
Elsewhere in the city, motorists drove their vehicles with headlights on due to the smoke cover which descended on the city.
The government launches regular awareness campaigns ahead of Bhogi, aimed at smoke-free celebrations of the day.
Meanwhile, Delhi - which celebrates Lohri today along with Punjab - woke up to a misty Saturday morning. "The day will mainly be clear", an India Meteorological Department (IMD) official said.