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

Return flights

31 Jul - 03 Aug	Wizz Air
30 Jul - 02 Aug	Pegasus Airlines
26 Jul - 31 Jul	Wizz Air
14 Jul - 24 Jul	Pegasus Airlines
09 Jul - 15 Jul	Pegasus Airlines
09 Jul - 09 Aug	Pegasus Airlines
12 Jul - 15 Jul	Wizz Air
10 Jul - 13 Jul	Pegasus Airlines
26 Jul - 03 Aug	Wizz Air
12 Jul - 19 Jul	Wizz Air
14 Jul - 19 Jul	Pegasus Airlines
13 Jul - 20 Jul	Pegasus Airlines
09 Jul - 16 Jul	Pegasus Airlines
15 Jul - 26 Jul	Pegasus Airlines

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

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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Cheapest return flights from Istanbul to Keflavik in July from $336

Return flights