They are expected to be the last of 3000 workers - a third of its workforce - sacked by the airline under a program announced in August.

Most of the latest cuts will come from Virgin's Brisbane headquarters.

Affected employees are expected to be consulted over the coming weeks and the majority of departures finalised by the end of March.

"We are exploring redeployment opportunities and we will be supporting those team members who will be leaving us, including through outplacement and other support services," a Virgin Australia spokesperson said on Thursday.

"We remain committed to retaining 6000 jobs and further growth when the market recovers.

"For this to happen, we need consumer confidence in state borders to enable travel demand to return, and international borders to open so we can re-commence international flying."

About 70 per cent of the affected workers have been stood down since the COVID-19 pandemic began.

Virgin had expected to be operating at 60 per cent capacity by the end of January when it came out of administration three months ago.

"In February, due to the impact of COVID-19 and the impact of continuing opening and closing of state and territory borders, we are operating at 40 per cent capacity," the airline said.

The Australian Services Union urged the federal government to extend the JobKeeper program beyond March, claiming uncertainty about the program's future was costing jobs.

"The government has said it is prepared to be agile to respond to emerging issues, but in the face of massive job losses in the aviation sector either side of Christmas, it does nothing," national secretary Robert Potter said in a statement.

"Each day the government delays its decision on whether to extend JobKeeper is costing more and more jobs, with a massive human cost to workers and their families."

Australian Associated Press