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

Return flights

06 Dec - 14 Dec	Fly Play	direct
09 Dec - 13 Dec	Fly Play	direct
04 Dec - 07 Dec	Fly Play	direct
03 Dec - 06 Dec	Fly Play	direct
05 Dec - 08 Dec	Fly Play	direct
10 Dec - 17 Dec	easyJet
15 Dec - 18 Dec	Fly Play	direct
10 Dec - 17 Dec	Fly Play	direct
01 Dec - 07 Dec	easyJet
13 Dec - 20 Dec	Fly Play	direct
31 Dec - 07 Jan	easyJet
31 Dec - 07 Jan	Icelandair	direct
30 Dec - 06 Jan	easyJet
31 Dec - 04 Jan	easyJet
24 Dec - 04 Jan	Icelandair	direct
31 Dec - 04 Jan	Icelandair	direct
22 Dec - 04 Jan	easyJet
23 Dec - 04 Jan	easyJet
26 Dec - 04 Jan	easyJet
24 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 168€

Return flights