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

Return flights

16 Sep - 21 Sep	Turkish Airlines
18 Sep - 21 Sep	Turkish Airlines
03 Sep - 16 Sep	Finnair
06 Sep - 16 Sep	Finnair
13 Sep - 24 Sep	Finnair
18 Sep - 25 Sep	Turkish Airlines
09 Sep - 29 Sep	Turkish Airlines
02 Sep - 09 Sep	Finnair
11 Sep - 18 Sep	Finnair
05 Sep - 12 Sep	Finnair
15 Sep - 15 Oct	Turkish Airlines
19 Sep - 04 Oct	Air France
19 Sep - 01 Oct	Finnair
29 Sep - 09 Oct	Air France
26 Sep - 03 Oct	Emirates
24 Sep - 08 Oct	Air France
15 Sep - 06 Oct	Finnair
27 Sep - 06 Oct	Finnair
27 Sep - 08 Oct	Finnair
28 Sep - 06 Oct	British Airways

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 $547

Return flights