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

Return flights

16 Oct - 23 Oct	Ryanair
23 Oct - 27 Oct	Ryanair
09 Oct - 16 Oct	Ryanair
07 Oct - 17 Oct	easyJet
22 Oct - 08 Nov	Ryanair
16 Oct - 19 Oct	Ryanair
22 Oct - 28 Oct	Ryanair
14 Oct - 23 Oct	Scandinavian Airlines
22 Oct - 29 Oct	Ryanair
08 Oct - 16 Oct	Ryanair
27 Oct - 10 Nov	easyJet
08 Oct - 19 Oct	Ryanair
23 Oct - 05 Nov	Ryanair
25 Oct - 08 Nov	easyJet
25 Oct - 01 Nov	easyJet
29 Oct - 10 Nov	easyJet
26 Oct - 03 Nov	Ryanair
25 Oct - 02 Nov	Scandinavian Airlines
26 Oct - 02 Nov	Scandinavian Airlines
30 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 179€

Return flights