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

Return flights

15 Sep - 19 Sep	Air China
17 Sep - 21 Sep	Air China
17 Sep - 25 Sep	Air China
12 Sep - 21 Sep	Air China
16 Sep - 24 Sep	Air China
12 Sep - 16 Sep	Air China
18 Sep - 25 Sep	Air China
16 Sep - 19 Sep	Air China
17 Sep - 19 Sep	Air China
16 Sep - 23 Sep	Air China
24 Sep - 01 Oct	Finnair
24 Sep - 05 Oct	Finnair
26 Sep - 02 Oct	Emirates
28 Sep - 15 Oct	Emirates
26 Sep - 01 Oct	Emirates
30 Sep - 02 Oct	Finnair
30 Sep - 05 Oct	Finnair
21 Sep - 05 Oct	Finnair
21 Sep - 04 Oct	KLM
03 Sep - 15 Oct	Finnair

Also check the deals for one-way flights from Hong Kong to Madrid in September.

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 September from 459€

Return flights