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	Lufthansa
21 Dec - 29 Dec	LOT
06 Dec - 12 Dec	easyJet
13 Dec - 15 Dec	easyJet
12 Dec - 19 Dec	easyJet
11 Dec - 19 Dec	easyJet
12 Dec - 19 Dec	Icelandair	direct
24 Dec - 28 Dec	easyJet
13 Dec - 15 Dec	Icelandair	direct
27 Dec - 03 Jan	Scandinavian Airlines

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 220€

Return flights