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 Kunming is April and the most expensive month to fly is May. (Average prices, based on 253 datapoints.)
The best day to arrive at Shanghai is Friday and it would be best to avoid Tuesday, as prices are on average 78.27% higher than on Friday. (Average prices, based on 253 datapoints.)
The best time to fly is at around 22. (Average prices, based on 283 datapoints.)