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

Return flights

27 Sep - 11 Oct	LATAM Airlines Group
19 Sep - 23 Sep	Avianca
05 Sep - 20 Sep	Avianca
04 Sep - 08 Sep	GOL Linhas Aéreas
17 Sep - 24 Sep	Copa
21 Sep - 29 Sep	Copa
25 Sep - 06 Oct	Copa
15 Sep - 30 Sep	Copa
07 Sep - 12 Sep	Copa
07 Sep - 22 Sep	Copa
07 Sep - 26 Sep	Copa
08 Sep - 26 Sep	Copa

Also check the deals for one-way flights from Asuncion to Miami 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 Asuncion to Miami in September from 602€

Return flights