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 Manila is May and the most expensive month to fly is March. (Average prices, based on 349 datapoints.)
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Sunday, as prices are on average 11.94% higher than on Tuesday. (Average prices, based on 2456 datapoints.)
The cheapest airline flying from Bangkok to Manila is Philippines AirAsia. They are 55% cheaper than Thai Airways. (Average prices, based on 353 datapoints.)
The best time to fly is at around 4. (Average prices, based on 630 datapoints.)