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

Return flights

30 Sep - 13 Oct	JetSmart
30 Sep - 04 Oct	JetSmart
23 Sep - 13 Oct	JetSmart
23 Sep - 04 Oct	JetSmart
24 Sep - 13 Oct	JetSmart
24 Sep - 04 Oct	JetSmart
26 Sep - 13 Oct	JetSmart
26 Sep - 04 Oct	JetSmart
30 Sep - 09 Oct	JetSmart
30 Sep - 10 Oct	JetSmart
09 Sep - 30 Sep	JetSmart
20 Sep - 30 Sep	Aerolineas Argentinas
09 Sep - 10 Sep	JetSmart
10 Sep - 30 Sep	JetSmart
11 Sep - 12 Sep	LATAM Airlines Group
23 Sep - 30 Sep	JetSmart
09 Sep - 11 Sep	JetSmart
24 Sep - 30 Sep	JetSmart
26 Sep - 30 Sep	JetSmart
25 Sep - 30 Sep	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 239€

Return flights