Fog caused delays and cancellations at Gatwick on one of the busiest days of the Christmas and new year holidays.
The disruption is expected to continue for the rest of the day after NATS (National Air Traffic Services) ordered restrictions because of poor visibility.
Gatwick said that temporary air traffic restrictions remained in place because of the poor visibility caused by the fog and warned passengers to expect delays.
And EasyJet, one of the biggest airlines at Gatwick, said that its flight schedule had been affected, with the restrictions causing knock-on effects.
The airport had been due to handle 769 flights – the most in a single day over the Christmas and new year holidays.
Passengers were advised to contact their airline for up-to-date information.
Today, other airports in the south east – Heathrow, Luton and Stansted – were not affected by the fog.
But yesterday the claggy conditions did appear to cause disruption at Gatwick as well as Heathrow, Luton and Manchester.
NATS said: “While the weather conditions have improved, fog continues to affect some airports in London today.
“Temporary air traffic restrictions are therefore in place at airfields with low visibility to maintain safety.
“Our teams are working closely with the airports and airlines to minimise disruption but passengers should check the status of their flight with their airline.”
EasyJet said: “Due to ongoing poor weather conditions resulting in air traffic control restrictions and delays at London Gatwick today, some flights this evening are now unable to operate as planned.
“We are doing all we can to minimise the impact of the weather for our customers, providing options to rebook or a refund for cancelled flights, as well as hotel accommodation and meals where required.
“We advise customers due to travel to and from London Gatwick today to check our flight tracker for the latest information on their flight.
“The safety and wellbeing of our customers and crew is our highest priority and, while this is outside of our control, we are very sorry for the inconvenience caused by the weather.”
