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

Return flights

27 Aug - 31 Aug	Finnair
27 Aug - 07 Sep	Finnair
27 Aug - 01 Sep	Finnair
21 Aug - 31 Aug	Finnair
22 Aug - 31 Aug	Finnair
12 Aug - 27 Aug	Finnair
19 Aug - 31 Aug	Finnair
21 Aug - 07 Sep	Finnair
19 Aug - 26 Aug	Finnair
23 Aug - 29 Aug	Finnair
19 Aug - 29 Aug	Finnair
13 Aug - 20 Aug	Finnair
17 Aug - 31 Aug	Finnair
29 Aug - 10 Sep	Finnair
25 Aug - 15 Sep	Finnair

Also check the deals for one-way flights from Hong Kong to Keflavik 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 Keflavik in August from $851

Return flights