AirHint found the following cheapest return flights from Barcelona (BCN) to Bangkok (DMK) in September 2025 (see full year).

Return flights

18 Sep - 01 Oct	Air China
24 Sep - 14 Oct	Etihad Airways
29 Sep - 14 Oct	Shenzhen Airlines
18 Sep - 06 Oct	Etihad Airways
17 Sep - 03 Oct	Etihad Airways
18 Sep - 02 Oct	Etihad Airways
26 Sep - 29 Sep	Iberia
21 Sep - 29 Sep	Qatar Airways
17 Sep - 24 Sep	Etihad Airways
26 Sep - 07 Oct	Iberia
19 Sep - 19 Oct	Etihad Airways
19 Sep - 30 Sep	Etihad Airways
19 Sep - 04 Oct	Etihad Airways
19 Sep - 03 Oct	Etihad Airways
18 Sep - 21 Sep	Etihad Airways
26 Sep - 30 Sep	Iberia
20 Sep - 30 Sep	Iberia
18 Sep - 28 Sep	Etihad Airways
19 Sep - 28 Sep	Etihad Airways
16 Sep - 18 Sep	Etihad Airways

Also check the deals for one-way flights from Barcelona 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 Barcelona to Bangkok in September from 655€

Return flights