The U.S. airline industry is dominated by four major players: Delta Air Lines, American Airlines, United Airlines, and Southwest Airlines. Competition is fierce, and flyers' demands and expectations are constantly growing. Political and geopolitical turbulence make smooth flying more difficult, in addition to weather conditions and general operating challenges. The four airline giants seem to be up unperturbed, staying afloat while several other carriers have filed for bankruptcy this year, such as Play ...