The aviation industry in China, where the virus emerged, has been one of the worst-affected by the crisis, following travel curbs by nations fearing contagion and shriveling demand.

The Chinese government last month criticized some of those curbs, especially those imposed by the United States, saying some countries had over-reacted.

However, the country has tightened checks on international travelers in recent days as the number of imported cases begins to exceed locally transmitted ones.

The capital Beijing is ordering 14 days in its quarantine facilities for anyone arriving from aboard, starting Monday.

Data from Cirium showed the number of flights to, from and within China canceled or removed from schedules totaled 506,662 from Jan. 1 through March 10. Of those, 101,906 were international flights, it said.

Chinese airlines reported a total loss of 20.96 billion yuan ($2.99 billion) in February, Civil Aviation Administration of China said last week.

(Reporting by Rama Venkat in Bengaluru and Brenda Goh in Shanghai; Editing by Mark Potter)