Jetstar is warning its customers that some people have been receiving fake emails that contain false information and a computer virus.
The airline has a recorded message on its phone line now telling people to disregard and not open any email sent to them with an attachment.
Tim Wilson says he booked a flight with Jetstar last week, and received the suspicious email yesterday morning.
"It said my flight was cancelled and that there would be a $70 change fee and that's what alarmed me, so I was able to call the landline and get through and I was told to the contrary," he said.
"I know there's a hoax and I know my flight is confirmed." Jetstar says it is an scam affecting several other companies, and that their security system has not been compromised.