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On October 30, 2026, a network failure in airline check-in systems at Incheon International Airport caused significant delays in departure procedures, particularly affecting ticket issuance on a busy Friday. The Dong-A Ilbo reports that the issue stemmed from network instability with U.S.-based ARINC, used by airlines for ticketing, with errors reported from early morning. Yonhap and Kyeonghyang Shinmun also covered the disruption, noting that check-in delays began around 4:30 a.m., leaving passengers stranded in long queues at departure halls. KBS World reported major boarding delays, with passengers waiting in long lines. Korean media outlets describe passengers as anxious and frustrated, with the situation causing widespread inconvenience at the airport.