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

Return flights

19 Dec - 27 Dec	Ryanair
12 Dec - 17 Dec	Ryanair
13 Dec - 15 Dec	Ryanair
07 Dec - 11 Dec	Lufthansa
08 Dec - 11 Dec	Ryanair
13 Dec - 16 Dec	Ryanair
19 Dec - 25 Dec	Ryanair
08 Dec - 13 Dec	Ryanair
11 Dec - 15 Dec	Ryanair
08 Dec - 12 Dec	Ryanair
31 Dec - 06 Jan	LOT
29 Dec - 01 Jan	LOT
31 Dec - 02 Jan	Ryanair
28 Dec - 01 Jan	Ryanair
25 Dec - 01 Jan	LOT
22 Dec - 02 Jan	Ryanair
31 Dec - 05 Jan	LOT
25 Dec - 02 Jan	Austrian Airlines
30 Dec - 04 Jan	Ryanair
29 Dec - 05 Jan	LOT

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Prague to Keflavik in December from 230€

Return flights