Cheapest return flights from Keflavik to Istanbul in September from $294

AirHint found the following cheapest return flights from Keflavik (KEF) to Istanbul (IST) in September 2026 (see full year).

Return flights

21 Sep - 06 Oct Wizz Air
22 Sep - 07 Oct Scandinavian Airlines
23 Sep - 07 Oct Scandinavian Airlines
24 Sep - 07 Oct Scandinavian Airlines
27 Sep - 07 Oct Wizz Air
29 Sep - 07 Oct Scandinavian Airlines
21 Sep - 05 Oct Wizz Air
21 Sep - 07 Oct Scandinavian Airlines
21 Sep - 02 Oct Wizz Air
25 Sep - 07 Oct Wizz Air

Also check the deals for one-way flights from Keflavik to Istanbul 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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