What Airline has the most cancelled Flights?

According to data from the Department of Transportation, Southwest Airlines had the most cancelled flights in 2019, with over 200,000 cancellation events. This was due largely in part to issues resulting from their reliance on the grounded Boeing 737 MAX 8. Other airlines with a high rate of cancelled flights include United Airlines, American Airlines, JetBlue, and Alaska Airlines, all with more than 100,000 cancelled flights each.

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