Distance

• Since China is such a large country, you should first select a city in China. Let's say that you select Beijing. The distance between Beijing and Boston is approximately 6,770 miles.
  
  

Flight Speed

• The average speed of a commercial passenger jet is about 565 miles per hour. This is, of course, only an average. An older commercial jet will have a cruise speed of 555 miles per hour, while a newer commercial jet can have a cruise speed of 590 miles per hour.
  
  

Flight Time

• If you divide the distance between Boston and Beijing (6,770) by the flight speed (565), you arrive at a flight time of approximately 12 hours. Other factors--such as a strong headwind or tailwind--will affect the flight time. According to the Happy Zebra online calculator, the flight time is 14 hours and 3 minutes.