CNN —A blast of severe winter weather last week caused thousands of Southwest Airlines flight cancellations and spiraled into a complete meltdown of its flight system. In October 2021, Southwest canceled more than 2,000 flights over a four-day period. While the airline blamed the crisis partly on bad weather in Florida, Southwest canceled flights for far longer than its competitors. Southwest’s scheduling system hasn’t changed much since the 1990s, according to Captain Casey Murray, president of the Southwest Airlines Pilots Association. But Southwest has consistently failed to perform as well as its competitors when it comes to cancellations, according to bureau data.

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