AirHint found the following cheapest one-way flights from Tokyo (NRT) to Bangkok (BKK) in September 2025 (see full year).

One-Way flights

17 Sep	Thai AirAsia X	direct
27 Sep	Thai AirAsia X	direct
15 Sep	China Eastern
15 Sep	Thai AirAsia X	direct
16 Sep	Thai AirAsia X	direct
04 Sep	Thai AirAsia X	direct
10 Sep	Thai AirAsia X	direct
12 Sep	Thai AirAsia X	direct
20 Sep	Thai AirAsia X	direct
22 Sep	Thai AirAsia X	direct

Also check the deals for return flights from Tokyo to Bangkok in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from Tokyo to Bangkok in September from 101€

One-Way flights