According to Boeing, the passenger load factor for China's domestic aviation industry reached a new high of 84.2% as of May this year, overtaking the US for the first time.
The load factor for US domestic routes was 83.8% as of May.
Boeing said that China's growth in passenger traffic was two to three times that of the global average.
"The boom of passenger traffic in the country is being driven by China's economic growth," said Huo Daren, the regional executive director of Boeing.
"Although China's market growth has been high, there's still a large space for growth," he said.
Boeing estimates that the scale of China's aviation market will overtakes Europe and the US in 20 years.