Please be aware that Bangkok and Taipei has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Taipei is March and the most expensive month to fly is February. (Average prices, based on 297 datapoints.)
The best day to arrive at Bangkok is Friday and it would be best to avoid Wednesday, as prices are on average 84.84% higher than on Friday. (Average prices, based on 297 datapoints.)
The cheapest airline flying from Bangkok to Taipei is Thai AirAsia. They are 56% cheaper than China Airlines. (Average prices, based on 305 datapoints.)
The best time to fly is at around 1. (Average prices, based on 456 datapoints.)