Since flight operations are determined by real-time weather conditions, the importance of weather information utilization in the airline industry is absolutely critical. Especially, abnormal flight operations due to the weather phenomenon is directly linked to a loss of airline, and also causes a deterioration in the quality of customer service. Therefore, this study analyzes occurrence conditions and correlates abnormal flight operations by the meteorological phenomenon at 4 major airports in Korea. Based on these results, it is aimed to provide a basis for stable flight operation to make the best decisions.