Cheapest return flights from Istanbul to Keflavik in September from $301

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

Return flights

11 Sep - 14 Sep Wizz Air UK
10 Sep - 13 Sep Wizz Air UK
23 Sep - 30 Sep Wizz Air UK
03 Sep - 09 Sep Norwegian
08 Sep - 10 Sep Wizz Air
25 Sep - 09 Oct Wizz Air UK
25 Sep - 28 Sep Wizz Air UK
15 Sep - 24 Sep Transavia France
09 Sep - 12 Sep Wizz Air UK
18 Sep - 24 Sep Fly One
10 Sep - 14 Sep Pegasus Airlines
25 Sep - 02 Oct Pegasus Airlines
27 Sep - 11 Oct Wizz Air UK
25 Sep - 09 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct

Also check the deals for one-way flights from Istanbul 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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