Passengers flying in and out of Beijing can expect some major changes over the next few years.

Beijing Capital International Airport is constructing a new runway to ease congestion and flight delays at China’s busiest airport, while 67 kilometers away, the city is building an entirely new airport with seven runways and an 80 billion yuan price tag.

Luo Liang, head of Beijing Capital International Airport’s planning and development department, said the airport’s three runways are currently operating beyond capacity, handling about 1,600 flights a day. “The construction of the new runway will start soon and be finished before the end of 2017. We expect the runway to become operational in 2018,” said Luo.

Luo said the additional runway will increase the airport’s on-time flight rate by 12 percent. According to the Civil Aviation Administration of China (CAAC), the airport’s departure on-time rate was less than 70 percent last year.

The new runway will allow Beijing Airport to handle 115 flights per hour during peak times, up from the current 89. Over a full calendar year, the airport anticipates it will be able to receive about 8 million more passengers, Luo said.

For six days this past May, Beijing Airport renovated its oldest runway, causing hundreds of flights to be cancelled or diverted to airports in neighboring Tianjin and Shijiazhuang. According to Xinhua, the last time the runway had been repaired was in 1996. The airport anticipates renovating the other two runways in the near future as well, said Luo.

Not long after the fourth runway becomes operational, Beijing will open an entirely new airport to the south of the capital.

Opening in 2019, the “New Beijing Airport” will have seven runways and handle 72 million travelers per year. The airport is expected to be a main transportation hub for the future Beijing-Tianjin-Hebei supercity, serving the areas of Daxing, Langfang, and Wuqing. The new airport is located 46 kilometers away from downtown Beijing (Tian’anmen Square), and 67 kilometers away from Beijing Capital International Airport.

Last year, 86 million passengers passed through Beijing Capital International on 582,000 flights. It has been ranked the second-busiest airport in the world by passenger numbers for five consecutive years by Airports Council International, second only to Hartsfield-Jackson Atlanta International Airport in the United States.