China has got the green light for a third airport for Beijing, with hopes it will reduce congestion and chronic delays.
The massive new airport will be located 46km south of the city centre and take five years to build, according to the China Daily newspaper and other outlets.
When completed, it will handle 72 million passengers per year, taking the pressure off Beijing Capital International Airport.
That airport, in the city's northeast, is the world's second-busiest and handled more than 83 million passengers last year.
A second airport, Nanyuan, is a former military airfield with limited capacity.
China is splashing out on specific infrastructure as part of efforts to limit its economic slowdown.
Beijing's is the third airport to get the go-ahead in just the last month, while feasibility studies for five other projects were approved in October.
State planning agency the National Development and Reform Commission has set the airport's construction budget at just over $US13 billion ($A14.07 billion).
Designed by Netherlands Airport Consultants BV, it will have a 700,000-square-metre main terminal and capacity to process two million tons of cargo per year.
The airport will be connected to Beijing by a 66km light rail line with travel times under 30 minutes.
China's fast growing air travel market is the world's second biggest, but the heavy air traffic and tight control of airspace by the military have given it the world's worst record for flight delays.