Please be aware that Bangkok and Taipei has multiple airports and that these results are only for airport and Taoyuan International Airport.
The best month to fly between Bangkok and Taipei is January and the most expensive month to fly is February. (Average prices, based on 804 datapoints.)
The best day to arrive at Bangkok is Wednesday and it would be best to avoid Thursday, as prices are on average 24.18% higher than on Wednesday. (Average prices, based on 798 datapoints.)
The cheapest airline flying from Bangkok to Taipei is Thai Lion Air. They are 67% cheaper than EVA Air. (Average prices, based on 812 datapoints.)
The best time to fly is at around 3. (Average prices, based on 1373 datapoints.)