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

Return flights

01 Dec - 06 Dec	easyJet
22 Dec - 26 Dec	easyJet
17 Dec - 23 Dec	easyJet
25 Dec - 01 Jan	LOT
22 Dec - 29 Dec	easyJet
13 Dec - 05 Jan	easyJet
19 Dec - 11 Jan	easyJet
25 Dec - 30 Dec	LOT
25 Dec - 02 Jan	LOT
13 Dec - 05 Jan	Icelandair	direct
22 Dec - 26 Dec	Icelandair	direct
28 Dec - 05 Jan	Ryanair
28 Dec - 02 Jan	Ryanair
26 Dec - 02 Jan	Icelandair	direct
01 Dec - 06 Dec	Icelandair	direct

Also check the deals for one-way flights from Prague 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 Prague to Keflavik in December from $182

Return flights