Cheapest return flights from Istanbul to Keflavik in May from $375

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

Return flights

26 May - 31 May Wizz Air UK
26 May - 29 May British Airways
19 May - 24 May Wizz Air UK
25 May - 29 May Turkish Airlines
11 May - 17 May Wizz Air UK
20 May - 27 May Turkish Airlines
20 May - 29 May Turkish Airlines

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

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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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