An article from Southwest Airlines adds TBWA/Chiat/Day to agency roster Published July 6, 2012 By Ryan Willumson post share post print email license Dallas—Southwest Airlines has selected TBWA/Chiat/Day, Los Angeles, to develop an advertising campaign, following a review. Southwest will keep GSD&M, Austin, Texas, as its lead creative agency. Recommended Reading Read More BtoB Magazine - News purchase licensing rights Filed Under: Video