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 Hong Kong is May and the most expensive month to fly is June. (Average prices, based on 3209 datapoints.)
The best day to arrive at Shanghai is Wednesday and it would be best to avoid Thursday, as prices are on average 35.46% higher than on Wednesday. (Average prices, based on 3349 datapoints.)
The cheapest airline flying from Shanghai to Hong Kong is Spring Airlines. They are 66% cheaper than Cathay Pacific. (Average prices, based on 3225 datapoints.)
The best time to fly is at around 21. (Average prices, based on 3348 datapoints.)