Cheapest return flights from Dublin to Keflavik in December from $167

Best time to book flights for Dublin (DUB) to Keflavik (KEF) flights at AirHint

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

Return flights

05 Dec - 07 Dec Fly Play direct
08 Dec - 12 Dec Fly Play direct
04 Dec - 07 Dec Fly Play direct
12 Dec - 15 Dec Fly Play direct
05 Dec - 08 Dec Fly Play direct
04 Dec - 08 Dec Fly Play direct
01 Dec - 08 Dec Fly Play direct
03 Dec - 06 Dec Ryanair
29 Dec - 02 Jan Fly Play direct
29 Dec - 03 Jan Fly Play direct
21 Dec - 01 Jan Fly Play direct
24 Dec - 01 Jan Icelandair direct
27 Dec - 01 Jan Fly Play direct
27 Dec - 03 Jan Fly Play direct
30 Dec - 02 Jan Icelandair direct
13 Dec - 17 Dec Icelandair direct
16 Dec - 19 Dec Icelandair direct
30 Dec - 03 Jan Icelandair direct

Also check the deals for one-way flights from Dublin to Keflavik in December.

Skyscanner

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