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

Return flights

15 Apr - 21 Apr	easyJet
17 Apr - 21 Apr	easyJet
08 Apr - 14 Apr	easyJet
09 Apr - 14 Apr	SKY express
08 Apr - 15 Apr	easyJet
13 Apr - 18 Apr	SKY express
09 Apr - 15 Apr	SKY express
09 Apr - 16 Apr	SKY express
20 Apr - 25 Apr	easyJet
11 Apr - 18 Apr	SKY express
30 Apr - 05 May	Scandinavian Airlines
30 Apr - 10 May	SKY express

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

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 April from $211

Return flights