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

Return flights

26 Aug - 27 Aug	China Southern
06 Aug - 13 Aug	China Eastern
02 Aug - 09 Aug	China Eastern
10 Aug - 17 Aug	China Eastern
15 Aug - 27 Aug	China Eastern
25 Aug - 26 Aug	China Southern
15 Aug - 30 Aug	Thai Lion Air
12 Aug - 19 Aug	China Eastern
01 Aug - 14 Aug	China Eastern
06 Aug - 11 Aug	China Eastern
30 Aug - 30 Sep	Air China
09 Aug - 09 Sep	Air France
29 Aug - 05 Sep	Austrian Airlines
23 Aug - 07 Sep	Austrian Airlines

Also check the deals for one-way flights from Bangkok to Barcelona 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 Bangkok to Barcelona in August from 680€

Return flights