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

Return flights

04 Oct - 06 Oct	Fly Play	direct
16 Oct - 18 Oct	Scandinavian Airlines
30 Oct - 06 Nov	Ryanair
29 Oct - 06 Nov	Aer Lingus
30 Oct - 08 Nov	Ryanair
11 Oct - 22 Oct	Ryanair
31 Oct - 06 Nov	Ryanair
12 Oct - 17 Oct	KLM
19 Oct - 26 Oct	Ryanair
03 Oct - 05 Oct	Fly Play	direct
09 Oct - 16 Oct	Ryanair
21 Oct - 26 Oct	Ryanair
14 Oct - 18 Oct	Ryanair
07 Oct - 11 Oct	Scandinavian Airlines
31 Oct - 07 Nov	Ryanair
27 Oct - 03 Nov	Scandinavian Airlines
25 Oct - 08 Nov	Aer Lingus
27 Oct - 07 Nov	Scandinavian Airlines
25 Oct - 03 Nov	Aer Lingus
30 Oct - 02 Nov	Ryanair

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Dublin to Keflavik in October from $170

Return flights