MULTAN, Dec 29th:Five domestic and international flights of Pakistan International Airlines (PIA) scheduled to land in Karachi and Lahore were diverted to Multan and other cities due to heavy fog on Thursday morning. PK- 741 from Istanbul to Lahore and PK-248 Dammam to Lahore were diverted to Multan. Low visibility at both airports since 2:00am necessitated flight diversions to nearby airports, PIA spokesman Danyal Gilani said in a statement.Four PIA flights — PK-732 from Jeddah to Karachi, PK-214 from Dubai to Karachi, PK-261 from Islamabad to Abu Dhabi, PK-788 from London to Karachi — were diverted to Muscat.Flight PK-248 from Dammam to Lahore was diverted to Multan Similarly PK-741 from Istanbul (Turkey) to Lahore were diverted to Multan.With an improvement in visibility, the flights were departed for their scheduled destinations, the statement said.The airline has advised passengers to call the PIA call centre to confirm flight times before arriving at the airport. Earlier on Saturday, 45 incoming and outgoing flights to and from Lahore were either cancelled or delayed when dense fog descended on the plains of Punjab and Sindh.