The cheapest airline flying to Hangzhou is XiamenAir. They are 68% cheaper than Scoot-Tiger. (Average prices, based on 226 datapoints.)
At Hangzhou the most flights depart around 12:00. (Hourly flights, based on 327 datapoints.)
From Hangzhou it is on average the cheapest to fly to Guangzhou and to Shenzhen. (Average prices, based on 114 datapoints.)
From Hangzhou most of the flights depart to Guangzhou, second best connected from Hangzhou is Chongqing. (Daily flights, based on 80 datapoints.)