The best month to fly between Shenzhen and Shanghai is September and the most expensive month to fly is April. (Average prices, based on 202 datapoints.)
The best day to arrive at Shenzhen is Saturday and it would be best to avoid Thursday, as prices are on average 122.8% higher than on Saturday. (Average prices, based on 384 datapoints.)
The cheapest airline flying from Shenzhen to Shanghai is China Eastern Airlines. They are 17% cheaper than XiamenAir. (Average prices, based on 209 datapoints.)
The best time to fly is at around 17. (Average prices, based on 232 datapoints.)