AirHint found the following cheapest return flights from Athens (ATH) to Keflavik (KEF) in May 2026 (see full year).

Return flights

07 May - 11 May	easyJet
07 May - 15 May	easyJet
05 May - 11 May	easyJet
14 May - 25 May	easyJet
07 May - 14 May	easyJet
18 May - 25 May	easyJet
09 May - 15 May	easyJet
14 May - 18 May	easyJet
07 May - 10 May	easyJet
22 May - 26 May	Scandinavian Airlines
28 May - 05 Jun	easyJet
28 May - 02 Jun	Wizz Air
31 May - 09 Jun	Aegean Airlines
29 May - 04 Jun	Scandinavian Airlines
25 May - 04 Jun	easyJet

Also check the deals for one-way flights from Athens to Keflavik in May.

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 May from 166€

Return flights