A monitor set up at Seoul's Gimpo International Airport shows flights slated to depart from Jeju were canceled due to heavy snow on Sunday. Yonhap

Major snowfall caused a series of road accidents and flight cancellations in southern South Korea on Sunday.

As of 6 p.m. Sunday, 50 outbound and 50 inbound flights at Jeju International Airport, on the southern resort island of Jeju, had been canceled.

A total of 141 flights were delayed, with the airport bustling all day long with travelers whose flights had been canceled and were looking to reschedule their flights. The airport has been placed under wind shear and strong wind warnings after getting blanketed by heavy snowfall earlier on the weekend.

Passenger ships departing from the Port of Jeju were disrupted while all sections of the 1100 Road were closed off due to heavy snow and ice as of 6:30 p.m.

A police vehicle prohibits traffic's entrance into a mountainous road on Jeju Island, Sunday. Yonhap

Entrance to Mount Halla, South Korea's highest mountain and key destination for visitors to Jeju, was blocked as more than 30 centimeters of snow piled up on parts of the mountain.

Other parts of the country also dealt with road accidents and flight cancellations on Sunday.