Sterling Airlines (Copenhagen Kastrup) has announced a variety of new seasonal services: Billund-Olbia: weekly B737-700 service starting on May 13 Billund-Prague: 2x weekly B737-500/-700 service starting on March 30 Copenhagen-Naples: 2x weekly B737-500/-700 service starting on April 5 Copenhagen-Olbia: 2x weekly B737-500/-700 service starting on June 4 Copenhagen-Trieste: weekly B737-500 service starting on May 17 Copenhagen-Varna: weekly B737-500 service starting on May 17 Gothenburg Landvetter-Bourgas: weekly B737-700 service starting on May 28 Stockholm Arlanda-Bourgas: 2x weekly B737-700/-800 service starting on April 5 Stockholm Arlanda-Naples: weekly B737-800 service starting on April 5 It has given up its Oslo Gardermoen-Dortmund route.