Please be aware that Bangkok has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Denpasar Bali is November and the most expensive month to fly is July. (Average prices, based on 399 datapoints.)
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Friday, as prices are on average 23.17% higher than on Tuesday. (Average prices, based on 956 datapoints.)