Severe fog and ice continue to disrupt air traffic at London with about 80 flights either cancelled or delayed.
But most long haul flights including those to and from the Middle East and the UAE remained unaffected.
Except for one British Airways flight from Dubai that was delayed by almost two hours this morning, almost all other flights to Heathrow continue to operate as scheduled.
While the Emirates and Etihad Airways flights from Dubai to Gatwick and Heathrow departed as scheduled at 8:20am, the British Airways flight BA 108 from to Dubai to Heathrow, scheduled to depart at 10:05 am, finally took off at 11:55 am.
Also affected were the passengers of Iberia and American Airlines which has a code-share agreement with the BA flight.
The airport had earlier warned passengers of a possible delay in schedules due to freezing fog.
A Twitter update about last night said, “There may be some disruptions tomorrow morning due to freezing fog tonight and tomorrow. Please check your flight status with your airline.”
The airport later said at least 20 flights have been affected, but mostly to Warsaw, Nice, Stockholm and several German cities, as well as internal flights to Manchester and Aberdeen.
All flights departing to Dubai and Abu Dhabi from Heathrow have not been affected are on schedule.
Meanwhile, passengers have once again expressing their displeasure on twitter, as to how Heathrow has failed to learn the lessons from earlier incidents of fog.
“What the hell is wrong with this place -2 and 20 flights out of Heathrow cancelled... -22 in Canada with snow 100% working!! #learn!!!” said a tweet posted by @leebaldry.
“A lot of people must ask questions at heathrow as it can't handle it ;),”said another tweet by @rwilson1694.
Last month, about 120 flights to and from London were affected, including 84 at Heathrow airport due to fog and poor visibility.