Virgin Australia has cancelled more than 10 services in and out of Melbourne, where a coronavirus cluster continues to grow.
"Due to the evolving situation in Greater Melbourne, Virgin Australia will cancel more than 10 services" set down for Thursday, the carrier said in a statement.
"While most services in and out of Melbourne today are operating as normal, we are adjusting our forward schedule to better reflect changing travel demand and booking trends."
Victoria is bracing for a likely fourth lockdown after the COVID-19 cluster in Melbourne's north expanded to 26 infections, as 11 new cases were diagnosed.
The government will hold a press conference on what happens next on Thursday morning.
Any lockdown could last up to a week and may extend beyond the Greater Melbourne area.
Meanwhile, Virgin is getting lots of calls and is asking customers who aren't travelling in the next 72 hours to call back later.
The airline will directly contact any customers impacted by changes to flights, including Melbourne services.
Australian Associated Press