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

Return flights

21 Oct - 27 Oct	easyJet
14 Oct - 21 Oct	easyJet
13 Oct - 16 Oct	Wizz Air Malta
30 Oct - 04 Nov	Wizz Air Malta
23 Oct - 27 Oct	easyJet
16 Oct - 21 Oct	Ryanair
08 Oct - 16 Oct	Ryanair
15 Oct - 21 Oct	Ryanair
22 Oct - 26 Oct	Ryanair
09 Oct - 14 Oct	Wizz Air
18 Oct - 27 Oct	easyJet
30 Oct - 07 Nov	Wizz Air Malta
30 Oct - 06 Nov	Wizz Air Malta
28 Oct - 08 Nov	Ryanair
28 Oct - 02 Nov	Aegean Airlines
27 Oct - 02 Nov	Wizz Air Malta
26 Oct - 01 Nov	Aegean Airlines

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 $259

Return flights