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

Return flights

16 Sep - 07 Oct	Ryanair
22 Sep - 07 Oct	Ryanair
25 Sep - 29 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
16 Sep - 29 Sep	Ryanair
30 Sep - 07 Oct	Ryanair
19 Sep - 08 Oct	Aer Lingus
15 Sep - 29 Sep	Ryanair
01 Sep - 30 Sep	Ryanair
03 Sep - 24 Sep	Ryanair
06 Sep - 23 Sep	Ryanair
17 Sep - 08 Oct	SWISS
06 Sep - 16 Sep	Ryanair
24 Sep - 12 Oct	SWISS
01 Sep - 08 Sep	TAP
08 Sep - 22 Sep	SWISS

Also check the deals for one-way flights from Dublin to Buenos Aires 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 Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Dublin to Buenos Aires in September from 877€

Return flights