Estonian Air (Tallinn Lennart Meri) is planning to add a fourth B737-500 to its fleet later this spring to launch and resume several services: Tallinn-Hamburg: 3x weekly B737-500 service starting on March 26 Tallinn-Vienna: 4x weekly B737-500 service starting on June 4 It has however given up its Tallinn-Berlin Tegel route in early January.