Southwest Airlines® (NYSE: LUV) new international service between Houston (Hobby) and the carrier’s 97th destination, Daniel Oduber Quiros International Airport at Liberia in the Guanacaste beach and resort region of northwest Costa Rica begins November 1, 2015. Southwest Employees, Customers, and Houstonians celebrated the new flights with Houston Mayor Annise Parker and other city leaders at a beach bash Wednesday afternoon in downtown Houston at City Hall Plaza. “Houstonians have endured some of the highest international airfares in the country,” said Gary…