AirHint found the following cheapest return flights from Buenos Aires (EZE) to Madrid (MAD) in September 2025 (see full year).

Return flights

22 Sep - 30 Oct	Avianca
22 Sep - 27 Oct	Avianca
21 Sep - 30 Oct	Avianca
22 Sep - 25 Oct	Avianca
20 Sep - 28 Oct	Avianca
25 Sep - 25 Oct	Avianca
25 Sep - 27 Oct	Avianca
25 Sep - 30 Oct	Avianca
25 Sep - 29 Oct	Avianca
20 Sep - 06 Oct	Avianca
09 Sep - 11 Sep	Avianca
07 Sep - 11 Sep	Avianca
12 Sep - 18 Sep	Avianca
21 Sep - 25 Sep	Avianca
21 Sep - 24 Sep	Avianca
22 Sep - 24 Sep	Avianca
14 Sep - 18 Sep	Avianca
09 Sep - 16 Sep	Avianca
11 Sep - 18 Sep	Avianca
06 Sep - 17 Sep	Avianca

Also check the deals for one-way flights from Buenos Aires to Madrid 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 Buenos Aires to Madrid in September from $1072

Return flights