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

Return flights

21 Oct - 27 Oct	Finnair
30 Oct - 16 Nov	Finnair
31 Oct - 17 Nov	Finnair
23 Oct - 30 Oct	Finnair
06 Oct - 21 Oct	SWISS
30 Oct - 09 Nov	Finnair
30 Oct - 08 Nov	Finnair
30 Oct - 07 Nov	Finnair
11 Oct - 21 Oct	Lufthansa
22 Oct - 03 Nov	Finnair
29 Oct - 05 Nov	Finnair
30 Oct - 15 Nov	Finnair
23 Oct - 02 Nov	Finnair
29 Oct - 08 Nov	Finnair
17 Oct - 27 Oct	Finnair
16 Oct - 30 Oct	Finnair
20 Oct - 28 Oct	Finnair
18 Oct - 30 Oct	Finnair
16 Oct - 22 Oct	Finnair
06 Oct - 14 Oct	SWISS

Also check the deals for one-way flights from Hong Kong to Keflavik in October.

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 October from $733

Return flights