WestJet is adding four new sun destinations and extend two more from seasonal to year-round as part of its 2012-2013 winter schedule. In the Caribbean, WestJet is adding Antigua & Barbuda, Curacao and Costa Rica -- all from Toronto Pearson International Airport. The carrier's newest Mexican destination is Manzanillo, via Calgary International Airport. John MacLeod, WestJet's vice-president, alliances, strategy and chief network officer, said that: "The addition of these new sun destinations as part of our 2012-2013 winter schedule demonstrates our ongoing strategic focus on expanding our...