Flights at the Delhi airport were delayed this morning due to bad weather and poor visibility, news agency ANI reported. Twenty flights to and from the Bengaluru airport too were delayed this morning due to fog. Flights were affected in Bhopal as well.
Dense fog in north India has affected train services too. Thirteen trains headed to Delhi are running late due to thick fog and cold wave.
The visibility dropped to zero metres at Palam area between 6:30 am and 7:30 am. "Fog Alert - Low Visibility Procedures have been implemented at Delhi Airport... Passengers are requested to contact the airline concerned for the updated flight info," the official Twitter handle of the Indira Gandhi International Airport stated. Runway visibility of upto 50 metres is required for an aircraft to land, it said.
Airlines such as Vistara and IndiGo have put out travel advisories asking passengers to check their flight status before heading to the airport.
Jet Airways said a few of their flights at Delhi, Bengaluru and Bhopal have been affected due to fog. Vistara also said flight delays are expected in Bengaluru and Delhi.
The minimum temperature in Delhi was recorded at 7.1 degrees. The Met department said the city will see moderate fog through the day. The air quality in Delhi was in "very poor" category this morning.
On Sunday, at least 50 flights scheduled between 6 am to 9 am were delayed due to foggy weather in Bengaluru, leaving passengers stranded for hours.
A Singapore-Bengaluru IndiGo flight and a Goa-Bengaluru Air India flight were also diverted to Chennai due to fog at Kempegowda International Airport.
On Friday, 42 flights were delayed and eight were delayed at the Bengaluru airport. Operations were also suspended for an hour because of poor visibility.
(With inputs from agencies)