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

Return flights

13 Oct - 20 Oct	easyJet
14 Oct - 20 Oct	easyJet
13 Oct - 19 Oct	easyJet
25 Oct - 08 Nov	easyJet
13 Oct - 18 Oct	easyJet
10 Oct - 20 Oct	easyJet
31 Oct - 06 Nov	easyJet
21 Oct - 27 Oct	Pegasus Airlines
02 Oct - 12 Oct	Scandinavian Airlines
06 Oct - 12 Oct	easyJet
07 Oct - 17 Oct	Scandinavian Airlines
01 Oct - 12 Oct	easyJet
25 Oct - 01 Nov	easyJet
27 Oct - 06 Nov	SKY express
29 Oct - 01 Nov	Aegean Airlines
27 Oct - 01 Nov	SKY express
25 Oct - 02 Nov	easyJet
27 Oct - 07 Nov	SKY express
24 Oct - 02 Nov	Vueling Airlines
23 Oct - 02 Nov	easyJet

Also check the deals for one-way flights from Athens 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 Athens to Keflavik in October from $233

Return flights