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

Return flights

12 Aug - 19 Aug	KLM
31 Aug - 07 Sep	Finnair
13 Aug - 27 Aug	China Eastern
05 Aug - 13 Aug	Air China
21 Aug - 18 Sep	Hong Kong Airlines
18 Aug - 28 Aug	China Eastern
18 Aug - 25 Aug	China Eastern
09 Aug - 25 Aug	Finnair
20 Aug - 17 Sep	SWISS
18 Aug - 24 Aug	Finnair
18 Aug - 26 Aug	China Eastern
28 Aug - 04 Sep	Hong Kong Airlines
18 Aug - 27 Aug	China Eastern
19 Aug - 31 Aug	Finnair
25 Aug - 11 Sep	Air China
27 Aug - 10 Sep	Finnair
29 Aug - 06 Sep	KLM
29 Aug - 09 Sep	KLM
26 Aug - 16 Sep	Finnair
23 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 $607

Return flights