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

Return flights

15 Oct - 20 Oct	Scandinavian Airlines
22 Oct - 25 Oct	Scandinavian Airlines
11 Oct - 15 Oct	Ryanair
11 Oct - 19 Oct	Ryanair
09 Oct - 15 Oct	Scandinavian Airlines
01 Oct - 06 Oct	Ryanair
09 Oct - 15 Oct	Icelandair	direct
11 Oct - 14 Oct	Ryanair
30 Oct - 03 Nov	Scandinavian Airlines
03 Oct - 08 Oct	Ryanair
03 Oct - 07 Oct	Ryanair
29 Oct - 05 Nov	Ryanair
27 Oct - 15 Nov	Ryanair
27 Oct - 15 Nov	Icelandair	direct
25 Oct - 02 Nov	Scandinavian Airlines

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 $190

Return flights