Flight Centre says the coronavirus outbreak will make it difficult to achieve its fiscal 2020 profit guidance.
The travel services provider said the virus was affecting its early second half travel patterns, particularly in Asia.
The company had previously pegged its underlying profit before tax forecast for fiscal 2020 at between $310 million to $350 million.
Managing director Graham Turner says it is too early to predict the virus's overall impact.
But the outbreak has already adversely affected Flight Centre's small corporate travel operations in China, Singapore and Malaysia.
He said other areas that could be affected in the upcoming months included corporate travel, leisure travel and Cross Hotels and Resorts.