Please be aware that Bangkok and Shanghai has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Shanghai is November and the most expensive month to fly is February. (Average prices, based on 400 datapoints.)
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Saturday, as prices are on average 245.78% higher than on Tuesday. (Average prices, based on 398 datapoints.)
The cheapest airline flying from Bangkok to Shanghai is Spring Airlines. They are 60% cheaper than China Eastern Airlines. (Average prices, based on 409 datapoints.)
The best time to fly is at around 1. (Average prices, based on 638 datapoints.)