Kelleher's culture code started with “an audacious commitment” to put employees first, customers second, and shareholders third. As a storyteller, Kelleher understood that culture is not something that a committee brainstorms once and moves on. Instead, cultures are built on stories that leaders share daily.

Southwest Airlines built its legendary culture through a philosophy popularized by co-founder Herb Kelleher: "The customer is second, the employee is first." By prioritizing employee satisfaction and "hiring for attitude, training for skill," Southwest created an environment where staff felt empowered to inject humor and personality into their work. This culture was reinforced by a "warrior spirit," a "servant’s heart," and a "fun-LUVing" attitude. In 2026, despite modern challenges and larger scales, the company maintains this through an egalitarian structure where executives often work alongside ground crews and flight attendants. They also use profit-sharing programs to ensure employees have a direct stake in the company's success. This "culture of ownership" encourages staff to go above and beyond, which historically led to industry-leading customer service rankings. While the airline has faced operational scrutiny in recent years, the core cultural pillar remains a focus on decentralized empowerment and a "pro-family" workplace environment.