The Dornier Do 18 was a development of the Do 16 flying boat. It was developed for the Luftwaffe but Lufthansa got 5 aircraft and used these for tests between the Azores and the North American continent in 1936 and on their mail route over the South Atlantic from 1937 to 1939. 27–29 March 1938 a Do 18 W established a seaplane record flying non-stop a straight distance of 8 391 km (5 214 mi) from Start Point Devon to Caravelas in Brazil.
Made by Dornier Flugzeugwerke.