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 212 datapoints.)
The best day to arrive at Shanghai is Monday and it would be best to avoid Saturday, as prices are on average 79.26% higher than on Monday. (Average prices, based on 216 datapoints.)
The cheapest airline flying from Shanghai to Guangzhou is China Eastern Airlines. They are 17% cheaper than Shanghai Airlines. (Average prices, based on 228 datapoints.)
The best time to fly is at around 14. (Average prices, based on 374 datapoints.)