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 Shenzhen is August and the most expensive month to fly is April. (Average prices, based on 749 datapoints.)
The best day to arrive at Shanghai is Monday and it would be best to avoid Thursday, as prices are on average 197.23% higher than on Monday. (Average prices, based on 683 datapoints.)
The cheapest airline flying from Shanghai to Shenzhen is Shenzhen Airlines. They are 10% cheaper than China Eastern Airlines. (Average prices, based on 765 datapoints.)