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

Return flights

19 Sep - 25 Sep	Iberojet	direct
19 Sep - 02 Oct	Iberojet	direct
08 Sep - 30 Sep	Iberia
08 Sep - 15 Sep	Iberia
08 Sep - 18 Sep	Iberia
08 Sep - 18 Sep	Iberojet	direct
16 Sep - 30 Sep	Etihad Airways
25 Sep - 27 Sep	Iberia
27 Sep - 02 Oct	Air India
19 Sep - 29 Sep	Iberia
07 Sep - 30 Sep	Iberia
20 Sep - 30 Sep	Iberia
18 Sep - 02 Oct	Saudia
27 Sep - 03 Oct	Iberia
08 Sep - 02 Oct	Iberojet	direct
27 Sep - 04 Oct	Air India
26 Sep - 12 Oct	Iberia
14 Sep - 05 Oct	Iberia
14 Sep - 09 Oct	Iberia
06 Sep - 13 Oct	Iberia

Also check the deals for one-way flights from Bangkok to Madrid 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 Bangkok to Madrid in September from 524€

Return flights