As of 2015, Southwest Airlines operates flights to 94 destinations in 41 states as well as Puerto Rico, Mexico, the Caribbean and Central America. Though Southwest was previously a domestic airline, it began international service after the acquisition of AirTran Airways in 2014.
The Southwest Airlines headquarters is located in Dallas, Texas, and the airline has 15 focus cities. They include Phoenix, Las Vegas, Los Angeles, Oakland and San Diego in the western United States. In the South, its focus cities are Houston, Dallas, Nashville, Tampa and Orlando, In the East and Midwestern states, destination cities include St. Louis, Milwaukee, Chicago, Baltimore and Denver.
In addition to the nonstop service available in these cities, the airline acquired new destinations when it merged with AirTran. These include additional cities in the domestic United States such as Grand Rapids, Memphis, Charlotte, Dayton and Des Moines. Other destinations include international flights to locations such as Mexico City, the Dominican Republic and the Bahamas. As of 2015, the airline flies to Aruba and Belize, among other destinations.
Because of budget concerns, Southwest often operates from secondary airports in major cities. For instance, its Chicago service operates out of Chicago Midway International Airport, and its service to New York City is out of LaGuardia Airport, as opposed to John F. Kennedy International.