Chinese authorities plan to allocate Beijing's second airport to SkyTeam alliance airlines, which include China Southern Airlines and China Eastern Airlines, the largest and third-largest carriers in China, according to an internal document from the Civil Aviation Administration of China.

According to the document, flights will be split between the new airport and the current Beijing Capital airport according to airline alliance. The SkyTeam members that currently operate out of Beijing Capital International Airport will move to the new airport in Daxing district; while Star Alliance's Air China together with its subsidiaries and the nation's fourth largest carrier Hainan Airlines will remain at Beijing Capital airport.

Under this plan, China Southern and China Eastern, as the main airlines based at the new airport, will account for 40% of total flights respectively. The rest 20% will be contributed by Hebei Airlines, Beijing Capital Airlines, China Postal Airlines and other.

Last September, China Southern and Beijing Capital International Airport Co., Ltd. (BCIA) signed a framework agreement on its base construction at the city's new airport.

According to the agreement, the Guangzhou-based carrier will become a main carrier based at the new Beijing airport. And it will deploy up to 100 aircraft at the new Beijing airport in 2019 and increase its fleet to 150 aircraft by 2025.

The 80-million-yuan Daxing airport, currently under construction, is expected to be completed by 2018; formal operations are scheduled to begin in 2019.

The new airport -- which is expected to serve Beijing, Tianjin and Hebei -- will be able to handle an annual passenger volume of 45 million in 2020, 72 million in 2025 and 100 million in the longer term.