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

Return flights

12 Aug - 24 Aug	Air China
02 Aug - 12 Sep	Air China
12 Aug - 16 Sep	Air China
04 Aug - 19 Aug	Air China
12 Aug - 02 Sep	Air China
06 Aug - 13 Aug	Air China
04 Aug - 12 Aug	Air China
14 Aug - 26 Aug	Air China
07 Aug - 24 Aug	Air China
07 Aug - 02 Sep	Air China
03 Aug - 17 Aug	Air China
19 Aug - 07 Sep	Air China
11 Aug - 22 Aug	Air China
17 Aug - 07 Sep	Air China
07 Aug - 19 Aug	Air China
11 Aug - 24 Aug	Air China
31 Aug - 14 Sep	Air China
11 Aug - 16 Sep	Air China
14 Aug - 04 Sep	Air China
31 Aug - 09 Sep	Air China

Also check the deals for one-way flights from Sydney 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 Sydney to Barcelona in August from $781

Return flights