In the United States, the market is overwhelmingly dominated by the three legacy carriers, United Airlines, American Airlines ...

Winter weather forced the closure of Houston's two main airports, causing numerous flight cancellations, primarily impacting United Airlines and Southwest Airlines. Houston's two main airports ...

Southwest also has a big operation at William P. Hobby Airport in Houston, and although its not technically a hub, because Southwest operates on a point-to-point model, its closure still could ...