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

Return flights

20 Aug - 27 Aug	Finnair
12 Aug - 27 Aug	Finnair
19 Aug - 03 Sep	Finnair
08 Aug - 22 Aug	Finnair
18 Aug - 31 Aug	Finnair
11 Aug - 26 Aug	Finnair
11 Aug - 21 Aug	Finnair
11 Aug - 20 Aug	Finnair
17 Aug - 25 Aug	Finnair
21 Aug - 25 Aug	Finnair
14 Aug - 24 Aug	Finnair
25 Aug - 08 Sep	Finnair
20 Aug - 02 Sep	SWISS
31 Aug - 08 Sep	Finnair
26 Aug - 09 Sep	Lufthansa
27 Aug - 01 Sep	Hainan Airlines
27 Aug - 03 Sep	Air China
27 Aug - 03 Sep	Cathay Pacific	direct
19 Aug - 03 Sep	Cathay Pacific	direct
20 Aug - 02 Sep	Cathay Pacific	direct

Also check the deals for one-way flights from Hong Kong to Madrid 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 Madrid in August from $656

Return flights