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

Return flights

12 Aug - 27 Aug	Finnair
12 Aug - 20 Aug	Finnair
20 Aug - 27 Aug	Finnair
17 Aug - 28 Aug	Finnair
04 Aug - 20 Aug	Finnair
14 Aug - 27 Aug	Finnair
28 Aug - 03 Sep	Finnair
28 Aug - 04 Sep	Finnair
27 Aug - 03 Sep	Finnair
16 Aug - 26 Aug	Finnair
13 Aug - 20 Aug	Finnair
10 Aug - 22 Aug	Finnair
06 Aug - 13 Aug	Finnair
23 Aug - 07 Sep	Finnair
31 Aug - 07 Sep	Finnair
02 Aug - 24 Sep	Finnair
28 Aug - 06 Sep	Finnair
15 Aug - 15 Sep	Finnair
29 Aug - 06 Sep	Finnair
30 Aug - 06 Sep	Finnair

Also check the deals for one-way flights from Hong Kong to Lisbon in August.

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 August from $666

Return flights