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 Phuket is September and the most expensive month to fly is February. (Average prices, based on 9540 datapoints.)
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Saturday, as prices are on average 29.82% higher than on Tuesday. (Average prices, based on 17069 datapoints.)
The cheapest airline flying from Bangkok to Phuket is Thai Lion Air. They are 40% cheaper than Bangkok Airways. (Average prices, based on 9598 datapoints.)
The best time to fly is at around 21. (Average prices, based on 14840 datapoints.)