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 June. (Average prices, based on 445 datapoints.)
The best day to arrive at Shanghai is Monday and it would be best to avoid Saturday, as prices are on average 91.14% higher than on Monday. (Average prices, based on 281 datapoints.)
The cheapest airline flying from Shanghai to Guangzhou is Hainan Airlines. They are 20% cheaper than Shanghai Airlines. (Average prices, based on 481 datapoints.)
The best time to fly is at around 19. (Average prices, based on 832 datapoints.)