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

Return flights

16 Jan - 23 Jan	easyJet
15 Jan - 18 Jan	Wizz Air UK
17 Jan - 30 Jan	Wizz Air UK
12 Jan - 15 Jan	Wizz Air UK
10 Jan - 12 Jan	Wizz Air UK
19 Jan - 22 Jan	Wizz Air UK
19 Jan - 25 Jan	Wizz Air UK
31 Jan - 06 Feb	Wizz Air UK
26 Jan - 29 Jan	Wizz Air UK
24 Jan - 29 Jan	Wizz Air UK
18 Jan - 24 Jan	Wizz Air UK
30 Jan - 05 Feb	easyJet
24 Jan - 01 Feb	Pegasus Airlines
26 Jan - 03 Feb	Pegasus Airlines
30 Jan - 05 Feb	Icelandair	direct
26 Jan - 03 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 151€

Return flights