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

Return flights

02 Oct - 06 Oct	Fly Play	direct
11 Oct - 22 Oct	Ryanair
11 Oct - 23 Oct	Ryanair
11 Oct - 20 Oct	Ryanair
11 Oct - 15 Oct	Ryanair
28 Oct - 04 Nov	Ryanair
30 Oct - 04 Nov	Ryanair
23 Oct - 26 Oct	Scandinavian Airlines
11 Oct - 24 Oct	Ryanair
21 Oct - 26 Oct	Ryanair
05 Oct - 13 Oct	Ryanair
19 Oct - 29 Oct	Ryanair
29 Oct - 04 Nov	Ryanair
31 Oct - 02 Nov	Ryanair
24 Oct - 03 Nov	Scandinavian Airlines
30 Oct - 02 Nov	Ryanair
28 Oct - 02 Nov	Ryanair
29 Oct - 02 Nov	Ryanair
29 Oct - 01 Nov	Ryanair
29 Oct - 01 Nov	Icelandair	direct

Also check the deals for one-way flights from Dublin 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 Dublin to Keflavik in October from 166€

Return flights