Cheapest return flights from Istanbul to Keflavik in May from $270

Best time to book flights for Istanbul (IST) to Keflavik (KEF) flights at AirHint

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

Return flights

22 May - 29 May Wizz Air
21 May - 29 May Wizz Air
07 May - 13 May Norwegian
14 May - 20 May Wizz Air
13 May - 17 May Pegasus Airlines
10 May - 17 May Pegasus Airlines
21 May - 27 May Pegasus Airlines
13 May - 19 May Pegasus Airlines
14 May - 19 May Pegasus Airlines
05 May - 06 May AJet
31 May - 04 Jun Pegasus Airlines
30 May - 05 Jun Pegasus Airlines
31 May - 08 Jun Turkish Airlines

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

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik