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

Return flights

09 Sep - 09 Oct	Air Canada
03 Sep - 20 Sep	Delta
08 Sep - 29 Sep	Delta
15 Sep - 27 Sep	Delta
06 Sep - 25 Sep	Delta
10 Sep - 28 Sep	Delta
12 Sep - 23 Sep	Delta
03 Sep - 27 Sep	Delta
09 Sep - 29 Sep	Delta
15 Sep - 29 Sep	Delta
17 Sep - 28 Sep	Delta
17 Sep - 06 Oct	Delta
11 Sep - 19 Oct	Delta
05 Sep - 03 Oct	Delta
24 Sep - 24 Oct	Delta
25 Sep - 24 Oct	Delta
24 Sep - 20 Oct	Delta
03 Sep - 02 Oct	Delta
17 Sep - 11 Oct	LEVEL	direct
17 Sep - 23 Oct	LEVEL	direct

Also check the deals for one-way flights from Barcelona 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 Barcelona to Santiago in September from $774

Return flights