AirHint found the following cheapest return flights from Helsinki (HEL) to Dublin (DUB) in September 2025 (see full year).

Return flights

29 Sep - 31 Oct	Ryanair
29 Sep - 02 Oct	Ryanair
22 Sep - 24 Sep	Ryanair
29 Sep - 04 Oct	Ryanair
24 Sep - 30 Sep	Ryanair
29 Sep - 03 Oct	Ryanair
24 Sep - 04 Oct	Ryanair
24 Sep - 28 Sep	Ryanair
22 Sep - 02 Oct	Ryanair
22 Sep - 29 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
22 Sep - 30 Sep	Ryanair
26 Sep - 28 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
30 Sep - 02 Oct	Scandinavian Airlines
30 Sep - 03 Oct	Scandinavian Airlines
24 Sep - 27 Sep	Ryanair
29 Sep - 20 Oct	Ryanair
23 Sep - 30 Sep	airBaltic
27 Sep - 24 Oct	Ryanair

Also check the deals for one-way flights from Helsinki 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 return flights from Helsinki to Dublin in September from 144€

Return flights