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

Return flights

16 Sep - 25 Sep	Air France
16 Sep - 23 Sep	Air France
16 Sep - 27 Sep	Air France
07 Sep - 25 Sep	Finnair
17 Sep - 02 Oct	Air France
07 Sep - 13 Sep	Air France
07 Sep - 14 Sep	Air France
23 Sep - 30 Sep	Air France
23 Sep - 02 Oct	Air France
15 Sep - 23 Sep	SWISS
07 Sep - 23 Sep	Air France
17 Sep - 24 Sep	Air France
23 Sep - 04 Oct	Air France
24 Sep - 01 Oct	Finnair
22 Sep - 03 Oct	Air France
25 Sep - 01 Oct	Finnair
29 Sep - 15 Oct	Finnair
25 Sep - 02 Oct	SWISS
29 Sep - 05 Oct	Finnair
29 Sep - 04 Oct	Finnair

Also check the deals for one-way flights from Hong Kong to Lisbon 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 Lisbon in September from 525€

Return flights