Cheapest return IST–KEF flights, May

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

Return flights

07 May - 14 May AJet
02 May - 09 May Scandinavian Airlines
09 May - 15 May AJet
02 May - 11 May Scandinavian Airlines
05 May - 27 May AJet
02 May - 10 May Scandinavian Airlines
09 May - 16 May AJet
06 May - 10 May Sichuan Airlines
06 May - 09 May AJet
10 May - 16 May Pegasus Airlines
30 May - 06 Jun Wizz Air UK

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

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