The sounds of sobbing, prayers and anguish echoed through the departures hall of an airport in southwestern South Korea on Monday as families of the victims killed when a passenger jet crash-landed over the weekend waited for their loved ones to be identified.

A Jeju Air flight drove off the runway in South Korea and collided with a fence, leaving dozens of passengers dead, the Yonhap News Agency reported.

Thousands of passengers at Gatwick Airport are facing delays for a fourth day in a row after severe fog led to widespread disruption over the Christmas period. More than 20 flights set to leave the airport today have been cancelled in advance while passengers have been told to expect delays.

Fog is continuing to disrupt flights at Gatwick Airport with restrictions imposed to maintain safety. On what is expected to be the airport's busiest day of the Christmas period, it said some flights "may be delayed throughout the day" due to "poor visibility" and apologised to customers.

Disruption continues at Gatwick Airport for a fourth day as thick fog causes flight cancellations and delays during the airport’s busy holiday period. A spokesperson for the airport has confirmed that air restrictions will be kept in place because of low visibility in airfields affected by fog.