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

Return flights

12 Sep - 25 Sep	Iberojet	direct
08 Sep - 25 Sep	Iberojet	direct
30 Sep - 07 Oct	Air India
08 Sep - 18 Sep	Iberojet	direct
12 Sep - 18 Sep	Iberojet	direct
08 Sep - 11 Sep	Iberojet	direct
20 Sep - 01 Oct	Air India
05 Sep - 07 Sep	Iberojet	direct
08 Sep - 15 Sep	Thai Lion Air
16 Sep - 03 Oct	Sichuan Airlines
26 Sep - 09 Oct	Iberojet	direct
25 Sep - 10 Oct	Thai Lion Air
30 Sep - 21 Oct	Etihad Airways
25 Sep - 21 Oct	Iberia
27 Sep - 09 Oct	Air India
08 Sep - 22 Sep	Thai Lion Air
12 Sep - 19 Sep	HK Express
29 Sep - 09 Oct	Iberia
17 Sep - 21 Oct	Iberia
19 Sep - 26 Sep	Qatar Airways

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 526€

Return flights