Qantas said in a statement on Monday it expected a further 27 flights to be delayed by up to 35 minutes and warned passengers of further disruptions over the next two days.
The Transport Workers Union, which represents baggage handlers and catering staff, called the strike action due to a dispute over pay and in opposition to planned domestic job cuts as the airline expands in Asia.
The strike would occur at all major Australian airports, the union said.
Aircraft engineers were also planning separate strike action on Tuesday which would affect more than 800 passengers, according to local media.
Qantas shares were trading 2.2 percent lower at A$1.56 at 0258 GMT, underperforming the wider market which fell 1.8 percent.
Copyright Reuters, 2011