United Airlines is cutting its capacity on service from the US to Hong Kong due to ongoing protests in the destination. It will also deploy different aircraft. The carrier had already suspended Chicago to Hong Kong flights in September. Service from Newark will be cut from daily to three flights per week during most of the winter, with just two flights in the weeks starting Jan. 19, Feb. 9 and Feb. 16. From San Francisco, United will drop one of its twice-daily flights for two weeks in February, scheduling one daily flight and a five-times-weekly flight. In addition, United will now operate an older 777-200 on the Newark-Hong Kong route instead of the 777-300ER it had been using. On San Francisco-Hong Kong flights, the airline will use 777-200s not yet fitted with the new Polaris business seats.