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

Return flights

02 Sep - 08 Sep	Delta
15 Sep - 29 Sep	Delta
08 Sep - 29 Sep	Delta
01 Sep - 15 Sep	Delta
15 Sep - 28 Sep	Delta
11 Sep - 03 Oct	Delta
24 Sep - 01 Oct	Delta
03 Sep - 05 Oct	Delta
28 Sep - 05 Oct	Delta
07 Sep - 22 Sep	Delta
16 Sep - 07 Oct	Delta
01 Sep - 22 Sep	Delta
11 Sep - 30 Sep	Delta
11 Sep - 26 Sep	Delta
01 Sep - 04 Sep	Delta
12 Sep - 03 Oct	Delta
12 Sep - 05 Oct	Delta
16 Sep - 16 Oct	Ryanair
02 Sep - 08 Oct	KLM
17 Sep - 08 Oct	Air France

Also check the deals for one-way flights from Dublin to Santiago 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.

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Cheapest return flights from Dublin to Santiago in September from 699€

Return flights