AirHint found the following cheapest one-way flights from Keflavik (KEF) to Dublin (DUB) in September 2025 (see full year).

One-Way flights

06 Sep	Fly Play	direct
22 Sep	Fly Play	direct
03 Sep	Fly Play	direct
27 Sep	easyJet
25 Sep	easyJet
20 Sep	Fly Play	direct
18 Sep	KLM
29 Sep	Scandinavian Airlines
23 Sep	Scandinavian Airlines
11 Sep	Fly Play	direct

Also check the deals for return flights from Keflavik to Dublin in September.

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 Dublin

Cheap car rent in Dublin

Cheapest one-way flights from Keflavik to Dublin in September from 86€

One-Way flights