Cheapest return flights from Istanbul to Keflavik in August from $429

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

Return flights

28 Aug - 01 Sep Pegasus Airlines
27 Aug - 03 Sep AJet
25 Aug - 01 Sep Pegasus Airlines
25 Aug - 28 Aug Fly One
26 Aug - 01 Sep Pegasus Airlines
30 Aug - 05 Sep Turkish Airlines
23 Aug - 28 Aug Turkish Airlines
29 Aug - 03 Sep Pegasus Airlines
29 Aug - 02 Sep Pegasus Airlines
23 Aug - 24 Aug Pegasus Airlines
27 Aug - 01 Sep Pegasus Airlines

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

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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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