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

Return flights

11 Dec - 21 Dec	Vueling Airlines
07 Dec - 14 Dec	Vueling Airlines
01 Dec - 22 Dec	Air China
05 Dec - 12 Dec	Air China
12 Dec - 26 Dec	Air China
01 Dec - 21 Dec	Air China
03 Dec - 18 Dec	Air China
05 Dec - 22 Dec	Air China
04 Dec - 28 Dec	Air China
01 Dec - 09 Dec	Wizz Air Malta
07 Dec - 06 Jan	Air China
11 Dec - 18 Jan	Air China
04 Dec - 01 Jan	Air China
09 Dec - 22 Jan	Air China
09 Dec - 08 Jan	Air China
10 Dec - 17 Jan	Air China
30 Dec - 24 Jan	Air China
29 Dec - 12 Jan	Vueling Airlines
30 Dec - 06 Jan	Air China
11 Dec - 08 Jan	Air China

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 480€

Return flights