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 September and the most expensive month to fly is March. (Average prices, based on 220 datapoints.)
The best day to arrive at Shanghai is Monday and it would be best to avoid Wednesday, as prices are on average 44.01% higher than on Monday. (Average prices, based on 405 datapoints.)
The cheapest airline flying from Shanghai to Hong Kong is Juneyao Airlines. They are 29% cheaper than Cathay Pacific. (Average prices, based on 244 datapoints.)
The best time to fly is at around 21. (Average prices, based on 439 datapoints.)