AirHint found the following cheapest return flights from Osaka (KIX) to Bangkok (BKK) in December 2025 (see full year).

Return flights

01 Dec - 08 Dec	Air China
11 Dec - 16 Dec	Air China
13 Dec - 16 Dec	Air China
15 Dec - 19 Dec	Air China
06 Dec - 08 Dec	Air China
02 Dec - 10 Dec	Air China
11 Dec - 13 Dec	Air China
18 Dec - 23 Dec	Air China
10 Dec - 14 Dec	Air China
13 Dec - 15 Dec	Air China
20 Dec - 12 Jan	Air China
12 Dec - 12 Jan	Air China
14 Dec - 14 Jan	Air China
13 Dec - 07 Jan	Air China
20 Dec - 07 Jan	Air China
24 Dec - 11 Jan	Thai AirAsia X	direct
13 Dec - 07 Jan	Thai AirAsia X	direct
20 Dec - 07 Jan	Thai AirAsia X	direct
19 Dec - 12 Jan	Thai AirAsia X	direct
16 Dec - 18 Jan	Air China

Also check the deals for one-way flights from Osaka to Bangkok in December.

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 return flights from Osaka to Bangkok in December from 153€

Return flights