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

Return flights

16 Sep - 23 Sep	American Airlines
24 Sep - 08 Oct	American Airlines
04 Sep - 25 Sep	Delta
18 Sep - 28 Sep	Delta
04 Sep - 22 Sep	Delta
08 Sep - 22 Sep	Delta
15 Sep - 22 Sep	Delta
17 Sep - 24 Sep	Delta
07 Sep - 14 Oct	Delta
07 Sep - 27 Oct	Delta
08 Sep - 15 Oct	Delta
09 Sep - 22 Sep	Delta
02 Sep - 25 Sep	Delta
16 Sep - 22 Sep	Delta
14 Sep - 01 Oct	Delta
29 Sep - 06 Oct	Delta
01 Sep - 01 Oct	Delta
17 Sep - 07 Oct	Delta
18 Sep - 07 Oct	Delta
15 Sep - 02 Oct	Delta

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 $632

Return flights