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

Return flights

26 Jan - 30 Jan	Wizz Air UK
18 Jan - 23 Jan	Wizz Air UK
18 Jan - 25 Jan	Wizz Air UK
23 Jan - 28 Jan	Wizz Air
16 Jan - 23 Jan	easyJet
08 Jan - 12 Jan	Wizz Air UK
26 Jan - 03 Feb	Pegasus Airlines
26 Jan - 05 Feb	Wizz Air UK
19 Jan - 27 Jan	Pegasus Airlines
09 Jan - 13 Jan	Wizz Air
18 Jan - 29 Jan	Wizz Air UK
17 Jan - 29 Jan	Wizz Air UK
23 Jan - 03 Feb	Pegasus Airlines
26 Jan - 03 Feb	Icelandair	direct
23 Jan - 03 Feb	Icelandair	direct
26 Jan - 05 Feb	Icelandair	direct

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

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 January from $174

Return flights