Source: Australian National Maritime Museum.
Maritime Journey from Britain to Australia, 1788-1960
As maritime technology improved, mostly through better ship
design and improved navigation, long distance maritime journeys were
reduced substantially. For instance, initial journeys in the late 18th
and early 19th centuries between Britain and Australia took between
70 and 110 days. The use of steam engines and the Suez shortcut in the
late 19th and early 20th centuries reduced the journey to about 40 days.
In the 1950s, the last liners, prior to the dominance of air transportation,
were able to do so in about 25 days.