If you want a cheap flight from Bangkok to Tokyo, you've got nine airlines to choose from. You can use the search box to filter your preferences, but we've found that the cheapest day to fly is 28 / Nov / 2019.
Tokyo Haneda International Airport is just one of the airports in Tokyo. If you're not set on a specific airport, try changing your search from Tokyo Haneda International Airport to Tokyo to see a broader range of flights – they might be cheaper. It usually takes about 12 hrs 35 mins to fly 4593 km to Tokyo Haneda International Airport.
You can expect accommodation prices to be higher at this time of year too. Last-minute deals do crop up, but it's best to book everything in advance to avoid disappointment.