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

Return flights

10 Jun - 19 Jun	AJet
12 Jun - 15 Jun	Wizz Air
10 Jun - 15 Jun	AJet
13 Jun - 19 Jun	Lufthansa
03 Jun - 17 Jun	AJet
17 Jun - 24 Jun	Pegasus Airlines
05 Jun - 12 Jun	Wizz Air
25 Jun - 28 Jun	Wizz Air
17 Jun - 21 Jun	AJet
23 Jun - 27 Jun	AJet
28 Jun - 05 Jul	Pegasus Airlines

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

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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Cheapest return flights from Istanbul to Keflavik in June from $311

Return flights