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

Return flights

29 Aug - 16 Sep	Vueling Airlines
30 Aug - 14 Sep	Ryanair
31 Aug - 11 Sep	Wizz Air Malta
31 Aug - 09 Sep	Air China
28 Aug - 17 Sep	ITA Airways
28 Aug - 11 Sep	SWISS
20 Aug - 08 Sep	Ryanair
27 Aug - 14 Sep	easyJet
21 Aug - 19 Sep	ITA Airways
26 Aug - 14 Sep	Wizz Air Malta
24 Aug - 27 Aug	Air China
20 Aug - 29 Aug	Ryanair
24 Aug - 28 Aug	Air China
22 Aug - 29 Aug	Ryanair
22 Aug - 25 Aug	Ryanair
21 Aug - 29 Aug	Wizz Air Malta
19 Aug - 29 Aug	Ryanair
23 Aug - 29 Aug	Wizz Air Malta
22 Aug - 27 Aug	Ryanair
20 Aug - 25 Aug	Ryanair

Also check the deals for one-way flights from Barcelona to Bangkok in August.

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 August from 539€

Return flights