Southwest Airlines Co., or simply Southwest, is a major airline in the United States that operates on a low-cost carrier model. It is headquartered in Love Field, Dallas neighborhood, in the Dallas–Fort Worth metroplex. It is the fourth-largest airline in North America when measured by passengers carried, as of 2023. With its all-Boeing 737 fleet, Southwest serves over 100 destinations in 42 states, Washington, D.C., Puerto Rico, and ten near-international countries: Aruba, the Bahamas, Belize, Canada, the Cayman Islands, Costa Rica, Cuba, the Dominican Republic, Mexico, Jamaica, and Turks and Caicos.
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