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

Return flights

09 Oct - 15 Oct	Wizz Air
02 Oct - 05 Oct	Wizz Air
09 Oct - 14 Oct	Wizz Air
21 Oct - 26 Oct	Norwegian
23 Oct - 28 Oct	Norwegian
05 Oct - 14 Oct	Wizz Air
07 Oct - 14 Oct	Wizz Air
08 Oct - 14 Oct	Wizz Air
23 Oct - 27 Oct	Wizz Air
09 Oct - 14 Oct	Norwegian	direct
29 Oct - 02 Nov	Wizz Air
29 Oct - 01 Nov	Icelandair	direct
31 Oct - 03 Nov	Icelandair	direct
29 Oct - 02 Nov	Icelandair	direct
28 Oct - 02 Nov	Ryanair
28 Oct - 01 Nov	Icelandair	direct
28 Oct - 02 Nov	Icelandair	direct
30 Oct - 02 Nov	Icelandair	direct

Also check the deals for one-way flights from Oslo 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 Oslo to Keflavik in October from $136

Return flights