The airline was established in 1967 by Herb Kelleher as Air Southwest Co. and adopted its current name, Southwest Airlines Co. , in 1971, when it began operating as an intrastate airline wholly within the state of Texas, first flight between Dallas and San Antonio. The airline has more than 57,000 employees as of March 2018[update] and operates more than 4,000 departures a day during peak travel season. As of 2014, it carried the most domestic passengers of any U. S. airline. As of October 2018, Southwest Airlines has scheduled services to 99 destinations in the United States and ten additional countries, with services to Turks & Caicos having begun on November 5, 2017. Service to four destinations in Hawaii is coming in late 2018 or early 2019 subject to FAA approval, with routes to be decided on and announced in the near future .