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

Return flights

23 Dec - 01 Jan	Lufthansa
27 Dec - 12 Jan	easyJet
27 Dec - 11 Jan	easyJet
27 Dec - 09 Jan	easyJet
12 Dec - 15 Dec	Scandinavian Airlines
27 Dec - 07 Jan	easyJet
30 Dec - 11 Jan	easyJet
27 Dec - 08 Jan	easyJet
27 Dec - 06 Jan	easyJet
26 Dec - 05 Jan	easyJet
15 Dec - 19 Dec	Wizz Air Malta
27 Dec - 10 Jan	easyJet
16 Dec - 20 Dec	Scandinavian Airlines
09 Dec - 29 Dec	Lufthansa
09 Dec - 28 Dec	easyJet
08 Dec - 28 Dec	easyJet
17 Dec - 26 Dec	easyJet
19 Dec - 28 Dec	easyJet
12 Dec - 15 Dec	Icelandair	direct
15 Dec - 19 Dec	Icelandair	direct

Also check the deals for one-way flights from Keflavik to Prague 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 Keflavik to Prague in December from $177

Return flights