Please be aware that Shanghai has multiple airports and that these results are for all airports serving the city.
The best day to arrive at Shanghai is Thursday and it would be best to avoid Sunday, as prices are on average 55.62% higher than on Thursday. (Average prices, based on 943 datapoints.)
The cheapest airline flying to Shanghai is XiamenAir. They are 80% cheaper than Singapore Airlines. (Average prices, based on 271 datapoints.)
At Shanghai the most flights depart around 20:00. (Hourly flights, based on 773 datapoints.)
From Shanghai it is on average the cheapest to fly to Hong Kong and to Guangzhou. (Average prices, based on 174 datapoints.)
From Shanghai most of the flights depart to Hong Kong, second best connected from Shanghai is Beijing. (Daily flights, based on 267 datapoints.)