"If the airplane is flying from east to west, it would be better to sit on the left side of the cabin, and if it is flying from west to east, sitting on the right side would be a smart choice," she said.

This year, Mid-Autumn Festival, or the 15th day of the eighth month of the lunar calendar, falls close to the Oct 1-7 National Day holiday. Many office workers have chosen to take the last week of September off work, and combine the two holidays to make a 16-day-long break, the longest combined break recorded in the past few years, Ctrip said.

In fact, the number of people who chose to take off the last week of September jumped more than 30 percent over last year, according to Ctrip.

This year's National Day holiday, when Chinese tourists' domestic and outbound travels peak, prices of domestic travel packages are slightly cheaper than last year. For the first time, more than 300 major tourism attractions nationwide will lower their admission prices, and nearly 90 percent of the spots are rated as the best and most popular destinations.