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

Return flights

28 Aug - 08 Sep	Fly Play	direct
30 Aug - 06 Sep	Fly Play	direct
28 Aug - 01 Sep	Fly Play	direct
30 Aug - 02 Sep	Fly Play	direct
29 Aug - 02 Sep	Fly Play	direct
30 Aug - 07 Sep	Fly Play	direct
29 Aug - 05 Sep	Fly Play	direct
29 Aug - 03 Sep	Scandinavian Airlines	direct
29 Aug - 01 Sep	Fly Play	direct
29 Aug - 31 Aug	Fly Play	direct
28 Aug - 31 Aug	Fly Play	direct
29 Aug - 04 Sep	Fly Play
26 Aug - 28 Aug	Ryanair
26 Aug - 30 Aug	Ryanair
26 Aug - 28 Aug	Fly Play	direct
26 Aug - 30 Aug	Scandinavian Airlines	direct

Also check the deals for one-way flights from Copenhagen 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 Copenhagen to Keflavik in August from $215

Return flights