Because of Cuba's relationship with the Soviet Union, the airport during the 1970s and 1980s enjoyed the presence of many Eastern Bloc airline companies, such as Aeroflot, Czechoslovak Airlines, Interflug, and LOT Polish Airlines. In 1977 an Aeroflot Ilyushin Il-62 operating a scheduled flight from Moscow to Havana via Frankfurt and Lisbon crashed after takeoff from Lisbon, killing 68 of the 70 on board and one person on the ground. In 1989 another Ilyushin Il-62, operated by Cubana as Cubana de Aviación Flight 9046, crashed shortly after takeoff from Havana. All 115 passengers and 11 crew members as well as a number persons on the ground were killed.