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

Return flights

03 Sep - 10 Sep	Finnair
08 Sep - 16 Sep	Finnair
18 Sep - 24 Sep	Air France
07 Sep - 17 Sep	Finnair
22 Sep - 29 Sep	Air France
06 Sep - 12 Sep	Finnair
09 Sep - 23 Sep	Finnair
11 Sep - 18 Sep	Finnair
14 Sep - 24 Sep	KLM
21 Sep - 29 Sep	Air France
24 Sep - 02 Oct	Finnair
20 Sep - 02 Oct	Finnair
07 Sep - 02 Oct	Finnair
25 Sep - 02 Oct	Finnair
12 Sep - 14 Oct	Finnair
27 Sep - 13 Oct	Finnair
29 Sep - 13 Oct	Finnair
27 Sep - 04 Oct	Finnair
25 Sep - 04 Oct	Finnair
13 Sep - 06 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 498€

Return flights