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

Return flights

20 Oct - 26 Oct	Lufthansa
22 Oct - 26 Oct	Lufthansa
01 Oct - 04 Oct	Ryanair
25 Oct - 01 Nov	easyJet
08 Oct - 12 Oct	Lufthansa
18 Oct - 27 Oct	LOT
18 Oct - 26 Oct	Lufthansa
31 Oct - 07 Nov	easyJet
07 Oct - 11 Oct	Wizz Air UK
25 Oct - 31 Oct	Lufthansa
06 Oct - 16 Oct	easyJet
22 Oct - 27 Oct	Norwegian
28 Oct - 01 Nov	easyJet
26 Oct - 03 Nov	LOT
26 Oct - 01 Nov	LOT
25 Oct - 02 Nov	easyJet
31 Oct - 07 Nov	Icelandair	direct
26 Oct - 01 Nov	Icelandair	direct
26 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 180€

Return flights