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A check-in system malfunction at Incheon International Airport on Friday caused major delays in passenger processing, beginning around 4:30 a.m. and lasting over 12 hours, according to Yonhap and the Korea Times. The disruption, traced to intermittent communication failures in the U.S. airline network ARINC, affected ticketing and boarding, with about 1,200 passengers experiencing inconvenience, the Dong-A Ilbo reports. While Korean carriers saw no delayed departures, Chinese airlines using the system faced delays, and the system was fully restored after roughly 13 hours, per Maeil Business Newspaper and Yonhap. Korean media coverage focuses on the operational chaos and the specific cause of the outage, with reports noting the impact on passengers and the eventual recovery.