Smoking aboard Australian domestic aircraft was banned on 1 December 1987.
On May 25, 1990, the Federal Government announced that smoking would be banned on international flights within Australian airspace, effective from 1 September 1990.
In October 1994 the Federal Government announced that smoking would be banned on all Australian international flights from July 1996, making Qantas and Ansett smokefree on all flights.
Agreement has been reached between Australia, the United States and Canada to ban smoking on all non-stop passenger flights operating between the three countries from March 1, 1995.
The international civil aviation body, the International Civil Aviation Organisation, has adopted the directive that inflight smoking should be banned by mid-1996 and is collaborating with the World Health Organization towards this end, although member states are left to determine their own policies.
From
http://www.tobaccoinaustralia.org.au...ndi/c06s12.htm