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

Return flights

02 Dec - 16 Dec	Pegasus Airlines
01 Dec - 16 Dec	Pegasus Airlines
01 Dec - 06 Dec	Pegasus Airlines
02 Dec - 17 Dec	Pegasus Airlines
01 Dec - 13 Dec	Pegasus Airlines
01 Dec - 25 Dec	Pegasus Airlines
01 Dec - 17 Dec	Pegasus Airlines
04 Dec - 09 Dec	Kuwait Airways
02 Dec - 13 Dec	Pegasus Airlines
01 Dec - 11 Dec	Pegasus Airlines
11 Dec - 02 Jan	Air China
06 Dec - 07 Jan	Air China
11 Dec - 23 Jan	Air China
01 Dec - 12 Jan	Air China
08 Dec - 08 Jan	Air China
03 Dec - 22 Jan	Air China
30 Dec - 09 Jan	Air China
30 Dec - 11 Jan	Air China
30 Dec - 07 Jan	Air China
10 Dec - 12 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 $553

Return flights