Cheapest return flights from Keflavik to Istanbul in September from 256€

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

Return flights

28 Sep - 17 Oct Fly Play
08 Sep - 01 Oct Fly Play
07 Sep - 18 Sep Fly Play
30 Sep - 19 Oct Wizz Air
08 Sep - 15 Sep KLM
11 Sep - 14 Sep KLM
02 Sep - 09 Sep Norwegian
04 Sep - 15 Sep Scandinavian Airlines
03 Sep - 09 Sep easyJet
05 Sep - 12 Sep Fly Play
05 Sep - 11 Sep Eurowings
04 Sep - 11 Sep Wizz Air
05 Sep - 10 Sep Eurowings

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