The recent move by United comes amid concern over the coronavirus outbreak in China and around the globe.
The last flight for more than a month took off from Manchester on Tuesday.
The Civil Aviation Administration of China's appeal to the country's airlines was reported on Xinhua's account on Chinese messaging app Weibo.
Instead dozens of global carriers have reduced or suspended flights to China in a bid to halt the pathogen's spread and as passenger numbers fall off a cliff.
It started as a trickle, with the likes of United Airlines announcing it would cut back some China flights. "But I believe after we say all arrivals have to be quarantined for 14 days from February 8 the number of arrivals will reduce", Lam said.
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In the meantime, the department is asking no one travel to China.
The White House said China had accepted its offer to have USA experts as part of a World Health Organization mission to study and help combat the virus.
Hong Kong has already suffered a steep downturn in passenger traffic as anti-government protests have roiled the island city.
The first African airline company had however decided initially to maintain its flights mainly to five cities (Beijing, Shanghai, Guangzhou, Chengdu and Hong Kong) stressing that China is a "strategic market" for its development.
Those airports include Los Angeles International, San Francisco International, New York's JFK, Chicago's O'Hare, Honolulu International, Seattle-Tacoma International and Atlanta Hartsfield-Jackson International.
The country's largest air carrier China Southern Airlines (China Southern), has sent flights to carry a total of 380 tonnes of medical supplies as of 6 p.m., February 2, according to the airline.