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

Return flights

20 Oct - 23 Oct	Lufthansa
08 Oct - 14 Oct	Lufthansa
09 Oct - 22 Oct	easyJet
10 Oct - 21 Oct	Lufthansa
09 Oct - 17 Oct	easyJet
27 Oct - 06 Nov	easyJet
15 Oct - 29 Oct	easyJet
19 Oct - 22 Oct	Lufthansa
13 Oct - 20 Oct	Lufthansa
17 Oct - 31 Oct	Lufthansa
23 Oct - 27 Oct	LOT
23 Oct - 03 Nov	LOT
31 Oct - 03 Nov	Ryanair
26 Oct - 03 Nov	LOT
25 Oct - 02 Nov	Ryanair
24 Oct - 03 Nov	Norwegian Air Sweden AOC
26 Oct - 03 Nov	Icelandair	direct
31 Oct - 03 Nov	Icelandair	direct
27 Oct - 01 Nov	Icelandair	direct
24 Oct - 03 Nov	Icelandair	direct

Also check the deals for one-way flights from Prague to Keflavik in October.

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 October from $205

Return flights