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

Return flights

12 Dec - 14 Dec	SWISS
12 Dec - 15 Dec	easyJet
15 Dec - 18 Dec	easyJet
13 Dec - 15 Dec	easyJet
07 Dec - 09 Dec	Ryanair
17 Dec - 22 Dec	easyJet
27 Dec - 01 Jan	easyJet
31 Dec - 02 Jan	easyJet
22 Dec - 29 Dec	easyJet
19 Dec - 26 Dec	Ryanair
19 Dec - 22 Dec	Ryanair
26 Dec - 01 Jan	easyJet
25 Dec - 28 Dec	LOT
28 Dec - 02 Jan	easyJet
29 Dec - 03 Jan	easyJet
27 Dec - 03 Jan	Wizz Air UK

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 152€

Return flights