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

Return flights

19 Aug - 31 Aug	Finnair
12 Aug - 25 Aug	Finnair
11 Aug - 24 Aug	Emirates
12 Aug - 23 Aug	Emirates
18 Aug - 30 Aug	Finnair
11 Aug - 21 Aug	Finnair
18 Aug - 22 Aug	Finnair
11 Aug - 23 Aug	Finnair
13 Aug - 22 Aug	Finnair
07 Aug - 24 Aug	Emirates
09 Aug - 01 Sep	Finnair
31 Aug - 06 Sep	Emirates
23 Aug - 07 Sep	Finnair
21 Aug - 09 Sep	SWISS
27 Aug - 07 Sep	Finnair
27 Aug - 11 Sep	SWISS
30 Aug - 06 Sep	SWISS
22 Aug - 06 Sep	SWISS
29 Aug - 05 Sep	SWISS
28 Aug - 08 Sep	SWISS

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Barcelona in August from $654

Return flights