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

Return flights

21 Dec - 30 Dec	China Eastern
20 Dec - 17 Jan	Hainan Airlines
05 Dec - 11 Dec	Air China
04 Dec - 13 Dec	Norse Atlantic Airways (UK)
04 Dec - 09 Dec	Qatar Airways
23 Dec - 30 Dec	China Eastern
05 Dec - 11 Dec	Iberojet	direct
01 Dec - 06 Dec	Air India
24 Dec - 01 Jan	Iberia
25 Dec - 09 Jan	Qatar Airways
04 Dec - 21 Dec	Iberia
17 Dec - 24 Dec	Iberia
22 Dec - 31 Dec	Iberia
19 Dec - 01 Jan	Iberia
21 Dec - 03 Jan	Iberia
19 Dec - 10 Jan	Iberia
20 Dec - 10 Jan	Iberia
20 Dec - 02 Jan	Iberia
28 Dec - 05 Jan	Sichuan Airlines
23 Dec - 04 Jan	Iberia

Also check the deals for one-way flights from Bangkok to Madrid 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 Bangkok to Madrid in December from 513€

Return flights