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

Return flights

04 Sep - 08 Sep	JetSmart
01 Sep - 08 Sep	JetSmart
19 Sep - 29 Sep	JetSmart
04 Sep - 19 Sep	JetSmart
19 Sep - 09 Oct	JetSmart
19 Sep - 03 Oct	JetSmart
01 Sep - 19 Sep	JetSmart
18 Sep - 29 Sep	JetSmart
18 Sep - 03 Oct	JetSmart
14 Sep - 29 Sep	JetSmart
18 Sep - 19 Sep	JetSmart
14 Sep - 03 Oct	JetSmart
14 Sep - 19 Sep	JetSmart
17 Sep - 29 Sep	JetSmart
17 Sep - 03 Oct	JetSmart

Also check the deals for one-way flights from Santiago to Asuncion 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 Santiago to Asuncion in September from $262

Return flights