Qantas will suspend its two direct services to mainland China due to travel restrictions imposed by other countries in the wake of the coronavirus outbreak.
The airline says entry restrictions imposed the United States, Singapore and other countries will impact the movement of crew who work across the Qantas International network.
It will suspend its Sydney-Beijing and Sydney-Shanghai services from February 9 until March 29.
The Beijing service was already due to end on February 23 for commercial reasons.
Hong Kong services will continue unchanged as it is currently exempt from travel restrictions.
Singapore from Sunday will stop allowing entry or transit to any people who have visited mainland China in the last fortnight.
The US is following a similar policy, but will grant entry to the immediate family of American citizens and permanent residents.
Qantas said February 9 was selected as a balance between high passenger demand in both directions and various travel restrictions.
"The suspension may be brought forward if demand levels or other factors change," the airline said on Saturday.
"The date for flights to resume will also be regularly reviewed based on the circumstances."
Customers booked to fly from February 9 to March 29 will be contacted by Qantas to discuss options. Codeshare flights with Chinese airlines will not be changed.
Qantas said it was liaising closely with the federal government on the impact on citizens currently in mainland China, and continued to take advice from the World Health Organisation and Australia's Chief Medical Officer on coronavirus.
The Transport Workers Union welcomed the move and called for all incoming flights from China to be suspended.
"This issue is getting more serious by the hour and it requires a calm but definite response," national secretary Michael Kaine said in a statement.
Australian Associated Press
