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

Return flights

01 Dec - 04 Dec	Pegasus Airlines
08 Dec - 12 Dec	Pegasus Airlines
08 Dec - 11 Dec	Pegasus Airlines
08 Dec - 09 Dec	Pegasus Airlines
07 Dec - 12 Dec	Pegasus Airlines
07 Dec - 09 Dec	Pegasus Airlines
05 Dec - 07 Dec	Pegasus Airlines
07 Dec - 11 Dec	Pegasus Airlines
05 Dec - 08 Dec	Pegasus Airlines
12 Dec - 15 Dec	AJet
31 Dec - 04 Jan	Pegasus Airlines
27 Dec - 04 Jan	Pegasus Airlines
28 Dec - 01 Jan	Pegasus Airlines
29 Dec - 01 Jan	Pegasus Airlines
29 Dec - 04 Jan	Pegasus Airlines
30 Dec - 03 Jan	Pegasus Airlines

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

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 December from 218€

Return flights