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 Tuesday and it would be best to avoid Wednesday, as prices are on average 207.38% higher than on Tuesday. (Average prices, based on 204 datapoints.)
The best time to fly is at around 20. (Average prices, based on 294 datapoints.)