The visibility in Delhi has reduced to just 50 metres.
Those set to catch a flight from Delhi this morning or arrive from another destination have been requested to check the updated information with their airlines since a dense fog may affect some flights. At least 35 flights to and from Delhi have already been delayed.
Delhi Airport's passenger advisory said this morning that landings and takeoff continue from its facility, but some flights may get affected due to the fog.
"While landing and takeoffs continue at Delhi airport, flights that are not CAT III compliant may get affected. Passengers are requested to contact the airline concerned for updated flight information. Any inconvenience caused is deeply regretted," Delhi Airport posted on X, formerly Twitter.
Around 110 domestic and international flights, both departures and arrivals, have been affected due to the fog, news agency ANI reported citing the Delhi Airport's Flight Information Display System.
North India woke up to a thick blanket of fog with cold wave sweeping across the region. The visibility in Delhi has reduced to just 50 metres while the minimum temperature dropped to 7 degrees Celsius.
Not just flights, the fog also affected trains bound for Delhi. Northern Railway said as many as 25 trains headed to the national capital are running late. The trains may be delayed by about 2-7 hours.
The India Meteorological Department (IMD) predicted "dense to very dense fog conditions" over Punjab, Haryana, Delhi, UP, Rajasthan and Madhya Pradesh.
Apart from Delhi, several north Indian cities woke up to foggy weather that reduced visibility. While Patiala, Lucknow and Prayagraj recorded very low visiblity of 25 metres, in Amritsar it dropped to 0 metres.
In Delhi, the Palam observatory near the Indira Gandhi International Airport recorded a visibility level of 125 metres while at the Safdarjung observatory it dropped to just 50 metres. However, commuters reported even lower visibility in several parts of the national capital.