ATHENS (Reuters) - Greece's largest carrier Aegean Airlines said on Tuesday nine-month net earnings grew 13 percent to 80.9 million euros (71.73 million pounds) on improved load factors and higher sales.Aegean, a member of the Star Alliance airline group, said revenue in July-to-September rose by 5 percent to 939 million euros as its load factor improved to 83.6 percent from 82.9 percent in the same period a year earlier.