AirHint found the following cheapest one-way flights from Bangkok (DMK) to Osaka (KIX) in September 2025 (see full year).

One-Way flights

25 Sep	Thai AirAsia X	direct
01 Sep	Thai Lion Air
22 Sep	Thai Lion Air
30 Sep	Thai AirAsia X	direct
10 Sep	Thai AirAsia X	direct
01 Sep	Thai AirAsia X	direct
17 Sep	Thai AirAsia X	direct
29 Sep	Thai AirAsia X	direct
22 Sep	Thai AirAsia X	direct
14 Sep	Thai AirAsia X	direct

Also check the deals for return flights from Bangkok to Osaka 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 Bangkok to Osaka in September from 93€

One-Way flights