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A network failure in airline check-in systems at Incheon International Airport is causing major boarding delays on Friday, October 30, 2026. The disruption began around 4:30 a.m., affecting multiple airlines and leaving passengers in long queues at departure halls. Yonhap reports that the outage stems from network instability in the U.S.-based ARINC system used by airlines for ticketing. Dong-A Ilbo notes that three airlines in Terminal 1 have suspended ticketing, and Kyunghyang Shinmun describes the situation as 'chaos' in departure areas, with passengers growing increasingly anxious.