United Airlines will add 10 new destinations next year — the largest international expansion in the Chicago-based company’s nearly 100-year history. The airline announced Tuesday that it will introduce nonstop flights to Okinawa, Japan; Toulouse, France; Luxembourg City, Luxembourg; Marseille, France; Ibiza, Spain; Valencia, Spain; Terceira, Portugal; Ljubljana, Slovenia; Olbia, Sardinia; and Catania, Sicily. Aside…
