The civil air communication was started by the German airlines in 1921. Initially the mail and passenger line Königsberg-Kaunas was served by Lloyd Luftdienst, Danziger Luftdienst, Danziger Luftpost. German-Soviet airline Deruluft airline opened regular service Königsberg-Kaunas-Smolensk-Moscow in May 1922. This was later expanded to the route Berlin-Danzig-Königsberg-Kaunas-Smolensk-Moscow. In 1923-1925 Latvian airline Latvijas Gaisa Satiksmes AS operated Königsberg-Kaunas-Riga-Tallinn-Helsinki route, with the latter being closed in 1925 due to low profitability and withdrawal of Latvian government subsidies. Since 1938 Polish airline LOT operated flights on the route Warsaw-Kaunas-Riga-Helsinki, also connecting with Stockholm. In 1931 the first passenger terminal was built, it was destroyed during World War II. A new Terminal was built in the 1970s. Aleksotas airport was the base of the first Lithuanian airline: the national airlineLietuvos oro linijos was founded in 1938, when Lithuanian government ordered two British-built twin engine six-seat planes Percival Q 6 Petrel. The planes were registered LY-SOA and LY-SOB and, commemorating the national trans-Atlantic heroes, were respectively named "Steponas Darius" and "Stasys Girėnas". The first Lithuanian civil airline was inaugurated on 5 September 1938 with domestic flights from Kaunas to the coastal resort of Palanga. Later in 1939 Lietuvos oro linijos launched international flights to Riga. All international connections were disrupted on June 16, 1940 when the airport was captured by the Red Army. Civil flights to Moscow were launched at the end of 1940 after the formal integration of Lithuania into the Soviet Union. In the early 1950s regular civilian connections with other towns were opened. Due to a short runway and limited extension possibilities the airport could accept only a very limited number of jet aircraft types. In the 1980s, Aleksotas Airport was considered one of the most dangerous airports in Europe due to its short runway. It is claimed that only one type of jet - the Yak-40 - could use this airport. Even so, in the 1980s it was a base for about 15 Yak planes, connecting with nearly 30 cities within the USSR, as far as Odessa and Simferopol. Regular passenger flights in Aleksotas airport were stopped in 1988 and were moved to a new Kaunas International Airport in Karmėlava at the northeastern outskirts of Kaunas. Paradoxically, the opening of the new airport coincided with long term decrease in the number of connections from Kaunas: the new airport had limited passenger facilities and the economic downturn of the early 1990s resulted in a significant overall reduction of air communication. After the withdrawal of the Russian Air Force in 1993, Aleksotas / S. Darius and S. Girėnas Airport serves general aviation. The airport hosts the Kaunas Air Club. Its historical importance makes it a natural host for the Lithuanian Aviation Museum. The old passenger terminal building was transferred to Aviation Museum on February 19, 1990.