Number of flights faced problem to land at Shahjalal International Airport in Dhaka due to severe fog on Saturday morning.One more planes failed to land at the runway after several attempts. Meanwhile, flight of Turkish Airlines and Qatar Airways were seen flying towards Kolkata.However, the airport authority said, the flight schedule has been prepared keeping matter of fog in mind. No flights were scheduled to fly before 9am.The domestic flights were also delayed, but flown after 8.30am, confirmed airport source.