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

Return flights

07 Dec - 21 Dec	Air China
05 Dec - 15 Dec	Air China
06 Dec - 20 Dec	Air China
03 Dec - 23 Dec	Air China
09 Dec - 16 Dec	Air China
08 Dec - 29 Dec	Air China
09 Dec - 13 Jan	Air China
06 Dec - 09 Jan	Air China
09 Dec - 12 Jan	Air China
09 Dec - 14 Jan	Air China
04 Dec - 08 Jan	Air China
03 Dec - 20 Dec	Vueling Airlines
10 Dec - 17 Dec	Vueling Airlines
01 Dec - 13 Dec	Air China
01 Dec - 07 Dec	Air China
05 Dec - 11 Jan	Air China
08 Dec - 09 Jan	Air China
09 Dec - 06 Jan	Air China
06 Dec - 08 Jan	Air China
31 Dec - 16 Jan	Vueling Airlines

Also check the deals for one-way flights from Barcelona 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 Barcelona to Bangkok in December from 501€

Return flights