"While our service between the US and HKG (Hong Kong) remains a vital part of our network, we have decided to suspend service between ORD (Chicago) and HKG after the return flight from HKG on September 9, 2019," the company said in a statement
Most of the protests were peaceful, but protesters closed the city's international airport two days earlier month.
United also plans to discontinue service between Guam International Airport (GUM) and Hong Kong beginning on October 14, a change that was announced earlier.
At the same time, United Airlines confirmed to CNN that it would add a second flight between San Francisco and Hong Kong this fall to supplement its existing service. "We look forward to our upcoming completion," the company added.