Cheapest return flights from Athens to Keflavik in September from $264

Best time to book flights for Athens (ATH) to Keflavik (KEF) flights at AirHint

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

Return flights

22 Sep - 28 Sep easyJet
16 Sep - 21 Sep easyJet
20 Sep - 28 Sep easyJet
08 Sep - 13 Sep Scandinavian Airlines
17 Sep - 21 Sep easyJet
23 Sep - 28 Sep easyJet
30 Sep - 04 Oct Scandinavian Airlines
25 Sep - 04 Oct Scandinavian Airlines
24 Sep - 04 Oct Scandinavian Airlines
30 Sep - 06 Oct Scandinavian Airlines
18 Sep - 23 Sep Scandinavian Airlines
08 Sep - 14 Sep Scandinavian Airlines
13 Sep - 21 Sep Ryanair
20 Sep - 22 Sep Fly Play direct
25 Sep - 05 Oct Ryanair
25 Sep - 03 Oct Ryanair
24 Sep - 03 Oct Ryanair
30 Sep - 07 Oct easyJet
30 Sep - 05 Oct Scandinavian Airlines
27 Sep - 06 Oct easyJet

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

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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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