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

Return flights

16 Sep - 24 Sep	KLM
16 Sep - 23 Sep	KLM
16 Sep - 26 Sep	KLM
17 Sep - 27 Sep	Air France
15 Sep - 25 Sep	Air China
16 Sep - 22 Sep	Air France
21 Sep - 25 Sep	Air China
16 Sep - 01 Oct	Finnair
14 Sep - 18 Sep	SWISS
10 Sep - 17 Sep	SWISS
11 Sep - 18 Sep	SWISS
19 Sep - 01 Oct	Finnair
20 Sep - 01 Oct	Emirates
21 Sep - 02 Oct	Emirates
20 Sep - 02 Oct	Emirates
23 Sep - 03 Oct	Air France
17 Sep - 01 Oct	Air France
24 Sep - 01 Oct	Emirates
29 Sep - 05 Oct	Finnair
22 Sep - 05 Oct	Hong Kong Airlines

Also check the deals for one-way flights from Hong Kong to Barcelona 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 Barcelona in September from 447€

Return flights