Please be aware that Tokyo and Bangkok has multiple airports and that these results are for all airports serving the city.
The best month to fly between Tokyo and Bangkok is June and the most expensive month to fly is March. (Average prices, based on 302 datapoints.)
The best day to arrive at Tokyo is Monday and it would be best to avoid Thursday, as prices are on average 318.16% higher than on Monday. (Average prices, based on 301 datapoints.)
The cheapest airline flying from Tokyo to Bangkok is Thai Airasia X . They are 89% cheaper than Japan Airlines. (Average prices, based on 318 datapoints.)
The best time to fly is at around 21. (Average prices, based on 444 datapoints.)