Please be aware that Shanghai has multiple airports and that these results are for all airports serving the city.
The best month to fly between Shanghai and Guangzhou is March and the most expensive month to fly is May. (Average prices, based on 283 datapoints.)
The best day to arrive at Shanghai is Monday and it would be best to avoid Tuesday, as prices are on average 75.83% higher than on Monday. (Average prices, based on 246 datapoints.)
The cheapest airline flying from Shanghai to Guangzhou is Spring Airlines. They are 36% cheaper than Hainan Airlines. (Average prices, based on 315 datapoints.)
The best time to fly is at around 16. (Average prices, based on 380 datapoints.)