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

Return flights

31 Dec - 07 Jan	LOT
31 Dec - 06 Jan	easyJet
29 Dec - 16 Jan	Finnair
30 Dec - 06 Jan	easyJet
23 Dec - 31 Dec	Air France
29 Dec - 11 Jan	LOT
30 Dec - 10 Jan	easyJet
31 Dec - 09 Jan	easyJet
22 Dec - 25 Dec	LOT
24 Dec - 07 Jan	LOT
29 Dec - 06 Jan	LOT
28 Dec - 07 Jan	Finnair
21 Dec - 24 Dec	Finnair
22 Dec - 24 Dec	Finnair
29 Dec - 31 Dec	easyJet
23 Dec - 25 Dec	Finnair
21 Dec - 25 Dec	Finnair
21 Dec - 31 Dec	Finnair
24 Dec - 27 Dec	SWISS
28 Dec - 31 Dec	Finnair

Also check the deals for one-way flights from Paris 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 Paris to Keflavik in December from 332€

Return flights