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

Return flights

05 Dec - 12 Dec	Ryanair
05 Dec - 08 Dec	Ryanair
05 Dec - 09 Dec	Ryanair
01 Dec - 07 Dec	Ryanair
23 Dec - 29 Dec	Ryanair
18 Dec - 21 Dec	Ryanair
15 Dec - 21 Dec	Ryanair
30 Dec - 04 Jan	Ryanair
30 Dec - 06 Jan	Ryanair
29 Dec - 04 Jan	Ryanair
27 Dec - 01 Jan	Ryanair
26 Dec - 01 Jan	Ryanair
26 Dec - 02 Jan	Ryanair
21 Dec - 29 Dec	Wizz Air
07 Dec - 08 Dec	Ryanair
22 Dec - 03 Jan	Ryanair
15 Dec - 19 Dec	Ryanair
27 Dec - 02 Jan	Ryanair
28 Dec - 02 Jan	Ryanair
28 Dec - 06 Jan	Wizz Air

Also check the deals for one-way flights from Warsaw 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 Warsaw to Keflavik in December from $278

Return flights