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

Return flights

20 Oct - 27 Oct	Scandinavian Airlines
26 Oct - 31 Oct	easyJet
26 Oct - 02 Nov	easyJet
14 Oct - 18 Oct	Norwegian
26 Oct - 01 Nov	easyJet
11 Oct - 17 Oct	easyJet
25 Oct - 31 Oct	Fly Play
13 Oct - 19 Oct	easyJet
05 Oct - 11 Oct	Fly Play
06 Oct - 12 Oct	easyJet
03 Oct - 06 Oct	KLM
05 Oct - 12 Oct	Fly Play
25 Oct - 01 Nov	easyJet
25 Oct - 01 Nov	Icelandair	direct
26 Oct - 01 Nov	Icelandair	direct
26 Oct - 02 Nov	Icelandair	direct

Also check the deals for one-way flights from Keflavik to Dublin 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 Keflavik to Dublin in October from 164€

Return flights