AirHint found the following cheapest return flights from Madrid (MAD) to Bangkok (BKK) in September 2026 (see full year).

Return flights

17 Sep - 25 Sep	ITA Airways
17 Sep - 25 Sep	Iberojet	direct
03 Sep - 11 Sep	Iberojet	direct
15 Sep - 28 Sep	ITA Airways
10 Sep - 25 Sep	ITA Airways
15 Sep - 30 Sep	ITA Airways
08 Sep - 30 Sep	ITA Airways
10 Sep - 23 Sep	ITA Airways
09 Sep - 16 Sep	KLM
09 Sep - 23 Sep	KLM
15 Sep - 15 Oct	KLM
21 Sep - 12 Oct	Air France
17 Sep - 01 Oct	Etihad Airways
19 Sep - 03 Oct	SWISS
28 Sep - 10 Oct	Etihad Airways
28 Sep - 11 Oct	Etihad Airways
11 Sep - 02 Oct	SWISS
26 Sep - 11 Oct	Etihad Airways
27 Sep - 20 Oct	Emirates
14 Sep - 09 Oct	Emirates

Also check the deals for one-way flights from Madrid to Bangkok in September.

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 September from 519€

Return flights