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

Return flights

09 Dec - 23 Dec	Etihad Airways
10 Dec - 20 Dec	Pegasus Airlines
10 Dec - 17 Dec	Etihad Airways
10 Dec - 16 Dec	Etihad Airways
02 Dec - 16 Dec	Air China
03 Dec - 07 Dec	Air China
04 Dec - 09 Dec	Air China
07 Dec - 12 Dec	Air China
08 Dec - 15 Dec	Air China
02 Dec - 22 Dec	Air China
07 Dec - 11 Jan	Etihad Airways
02 Dec - 28 Jan	Etihad Airways
01 Dec - 30 Jan	Etihad Airways
04 Dec - 30 Jan	Etihad Airways
05 Dec - 06 Jan	Air China
07 Dec - 06 Jan	Air China
04 Dec - 12 Jan	Air China
09 Dec - 09 Jan	Etihad Airways
09 Dec - 10 Jan	Etihad Airways
04 Dec - 09 Jan	Etihad Airways

Also check the deals for one-way flights from Madrid 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 Madrid to Bangkok in December from 489€

Return flights