Cheapest return flights from Istanbul to Keflavik in May from 289€

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

Return flights

27 May - 03 Jun Scandinavian Airlines
20 May - 24 May Scandinavian Airlines
27 May - 31 May Scandinavian Airlines
11 May - 17 May Transavia France
24 May - 29 May Scandinavian Airlines
25 May - 29 May Scandinavian Airlines
22 May - 29 May Scandinavian Airlines
31 May - 07 Jun Scandinavian Airlines
05 May - 27 May AJet
25 May - 30 May Scandinavian Airlines
22 May - 31 May Scandinavian Airlines
29 May - 05 Jun Scandinavian 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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