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 Yangon is May and the most expensive month to fly is November. (Average prices, based on 3364 datapoints.)
The best day to arrive at Bangkok is Saturday and it would be best to avoid Friday, as prices are on average 24.74% higher than on Saturday. (Average prices, based on 3364 datapoints.)
The cheapest airline flying from Bangkok to Yangon is Thai AirAsia. They are 73% cheaper than Myanmar Airways. (Average prices, based on 3371 datapoints.)