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

Return flights

10 Dec - 17 Dec	easyJet
13 Dec - 17 Dec	easyJet
15 Dec - 20 Dec	easyJet
13 Dec - 20 Dec	easyJet
17 Dec - 21 Dec	easyJet
15 Dec - 01 Jan	easyJet
04 Dec - 09 Dec	easyJet
15 Dec - 19 Dec	easyJet
15 Dec - 03 Jan	easyJet
06 Dec - 13 Dec	easyJet
23 Dec - 02 Jan	LOT
25 Dec - 02 Jan	LOT
11 Dec - 14 Dec	easyJet
13 Dec - 20 Dec	Icelandair	direct
23 Dec - 01 Jan	easyJet
31 Dec - 05 Jan	easyJet
24 Dec - 01 Jan	easyJet
24 Dec - 01 Jan	Icelandair	direct
31 Dec - 05 Jan	Icelandair	direct
23 Dec - 02 Jan	Icelandair	direct

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 179€

Return flights