The U.S. planemaker said Chinese airlines would need 8,560 new commercial planes through 2042, up from 8,485 in its previous forecast last year.
In June, the company said it remained "very bullish" on China, which would make up 20% of the global market for air travel.
Boeing, however, is still waiting to resume deliveries of its bestselling 737 MAX to Chinese airlines more than four years after they were halted following two deadly crashes and has been all but shut out of new orders from the carriers since 2017.
The U.S. planemaker said China's fleet would more than double to nearly 9,600 jets over the next 20 years and its domestic aviation market would be the largest in the world by the end of the forecast period, with demand for 6,470 single-aisle planes such as the Boeing 737 MAX family.
"Domestic air traffic in China has already surpassed pre-pandemic levels and international traffic is recovering steadily," Darren Hulst, Boeing vice president for commercial marketing, said in a statement.
"As China's economy and traffic continue to grow, Boeing’s complete line-up of commercial jets will play a key role in helping meet that growth sustainably and economically."
Boeing has about 85 MAX jets in inventory for Chinese customers and 55 MAXs originally slated for Chinese airlines have been remarketed, the company said in July.
Reuters reported in April that China's aviation regulator published a report that Boeing viewed as a key step for the U.S. planemaker to resume deliveries, but none have resumed yet.
