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

Return flights

02 Oct - 09 Oct	Fly Play	direct
07 Oct - 10 Oct	easyJet
07 Oct - 21 Oct	Norwegian
01 Oct - 06 Oct	Fly Play	direct
30 Oct - 02 Nov	Fly Play	direct
17 Oct - 20 Oct	Fly Play	direct
09 Oct - 16 Oct	Fly Play	direct
03 Oct - 06 Oct	Fly Play	direct
10 Oct - 13 Oct	Fly Play	direct
13 Oct - 16 Oct	Fly Play	direct
20 Oct - 23 Oct	Fly Play	direct
26 Oct - 01 Nov	Icelandair	direct
29 Oct - 01 Nov	Scandinavian Airlines

Also check the deals for one-way flights from Copenhagen 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 Copenhagen to Keflavik in October from $197

Return flights