Go through your results for flights to Zhengzhou in China with Netflights. Although Air China usually has the best prices, it's best to double check what's available for your travel dates.
If you don’t have set dates for when you want to fly to Zhengzhou, try searching by month – that way, you can compare airfares throughout the year.
But if you're struggling to find flights to Zhengzhou that work for you, try looking at other airports in China.
Looking at a few different departure airports will give you even more choice. See what you can find. And remember, it's best to book your flights in advance wherever possible.