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

Return flights

19 Jan - 22 Jan	Wizz Air UK
05 Jan - 08 Jan	easyJet
08 Jan - 09 Jan	Pegasus Airlines
08 Jan - 13 Jan	Pegasus Airlines
17 Jan - 20 Jan	Pegasus Airlines
08 Jan - 10 Jan	Pegasus Airlines
08 Jan - 11 Jan	Pegasus Airlines
08 Jan - 12 Jan	Pegasus Airlines
08 Jan - 08 Jan	Pegasus Airlines
02 Jan - 04 Jan	Wizz Air UK

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 $219

Return flights