This project used a dataset from Kaggle that tracks the on-time performance of US Domestic flights operated by large air carriers in 2015.
For 2015, Texas (661) and Illinois (537) have the most flight cancellations. Weather is the top reason for a flight cancellation causing 2,397 cancellations all year. Southwest Airlines had 818 canceled flights in 2015. In May, Texas had 98 flight cancellations and weather was the reason for a total of 133 flight cancellations in May as well. Further research showed that Texas had extreme weather in May 2015.