Cheapest return flights from Athens to Keflavik in September from $243

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
23 Sep - 28 Sep easyJet
11 Sep - 18 Sep Scandinavian Airlines
24 Sep - 28 Sep easyJet
04 Sep - 08 Sep Scandinavian Airlines
11 Sep - 21 Sep Scandinavian Airlines
18 Sep - 23 Sep Scandinavian Airlines
25 Sep - 28 Sep easyJet
19 Sep - 27 Sep easyJet
13 Sep - 21 Sep Ryanair
24 Sep - 07 Oct Ryanair
30 Sep - 07 Oct Ryanair
23 Sep - 06 Oct Scandinavian Airlines
23 Sep - 03 Oct Ryanair
30 Sep - 06 Oct Scandinavian Airlines
27 Sep - 06 Oct Transavia France
24 Sep - 03 Oct easyJet
20 Sep - 03 Oct Fly Play direct
23 Sep - 03 Oct Fly Play direct
30 Sep - 06 Oct Fly Play direct

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

Skyscanner

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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