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

Return flights

11 Sep - 21 Sep	Avianca
06 Sep - 19 Sep	Avianca
11 Sep - 19 Sep	Avianca
13 Sep - 12 Oct	LATAM Airlines Group
15 Sep - 28 Sep	Iberia
11 Sep - 26 Sep	Avianca
24 Sep - 15 Oct	Ryanair
11 Sep - 09 Oct	LATAM Airlines Group
24 Sep - 10 Oct	Ryanair
15 Sep - 26 Sep	Iberia
18 Sep - 02 Oct	LATAM Airlines Group
13 Sep - 06 Oct	LATAM Airlines Group
19 Sep - 11 Oct	Ryanair
30 Sep - 17 Oct	Ryanair
11 Sep - 24 Sep	Avianca
29 Sep - 10 Oct	Ryanair
01 Sep - 26 Sep	Air Europa
05 Sep - 18 Sep	LATAM Airlines Group
15 Sep - 25 Sep	Iberia

Also check the deals for one-way flights from Barcelona 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 Barcelona to Asuncion in September from $976

Return flights