it is about 14h... see http://flighttime-calculator.com/
About 20 hours.
The distance between Chicago, Illinois and Shanghai, China is 7073 miles (11383 km).Flight time is approximately 14-16 hours.
The flight distance from Chicago, Illinois to Beijing, China is: 6,605 miles / 10,629 km
The flight time from Shanghai, China to Wuhan, China is approximately 50 minutes.
The flight time from Shanghai, China to Xian, China is:2 hours, 1 minute
The flight distance from Xian, China to Hangzhou, China is 713 miles / 1,147 km
a good example is: AA288, from Shanghai, China (PVG) to Chicago, IL (ORD) takes 13 hrs 40 mins; while, AA289, from Chicago, IL (ORD) to Shanghai, China (PVG) takes 14 hrs 40 mins.
10hr 40min Shanghai Pu Dong (PVG) to Vancouver (YVR) by a nonstop flight operated by China Eastern Airlines.
A typical flight between LAX and Shanghai, China would have a flying time of about 13 hours, 1 minutes.
It's really, really long! From Chicago to Korea (which is so close to china) is about 17.5 hours to 19 hours, depending on the route, weather, plane, etc. On the way back, its about 2 hours less, because you have a tailwind. This is assuming you take a pacific flight, which is 99% of the time.
The flight time from Guangzhou, China to Shanghai, China is approximately 1 hour and 59 minutes. The exact travel time depends on factors such as weather conditions and delays.
The flight time from Shanghai, China to Cairns, Australia is about 7 hours, 21 minutes.