The airline said it had learned from the Ministry of Finance website that firms and individuals in China that provide international transport services "shall be exempt from business tax."
The company has not received any formal notice about the exemption.
But BF News reports Air China says that, based on actual air traffic revenue generated from international and regional routes for 2009 and a consolidated tax rate of approximately 3.21%, it is estimated that the company will benefit by around $80m for 2009 under such a policy.