Southwest Airlines

Southwest Airlines in Fortune Rankings

Lawyer-turned-entrepreneur Herb Kelleher and Texas businessman Rollin King launched Air Southwest in 1967, later renaming it Southwest Airlines. The low-cost carrier now operates a fleet of more than 800 planes, exclusively Boeing 737s, and serves destinations in 42 U.S. states. Its international routes focus on nearby countries such as Mexico, Jamaica, and Costa Rica, though the airline has applied for approval to expand into Europe. In 2026, Southwest plans to end its long-standing open-seating policy—one of several changes proposed in response to pressure from activist investor Elliott Investment Management.

Southwest Airlines stock chart

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