The number of flights a well designed airport can handle is insane, and since most airports in China are new, they'll likely avoid this problem for a long time.

The number of flights a well designed airport can handle is insane, and since most airports in China are new, they'll likely avoid this problem for a long time. The problem for awhile was that airports like Heathrow and JFK simply did not have the capability to handle being the major hubs that they were. New hubs, like Atlanta or Dallas Fort Worth, can more than handle their role as a major hub. The answer isn't building bigger planes, but building better airports.