AirHint found the following cheapest return flights from Madrid (MAD) to Buenos Aires (AEP) in September 2026 (see full year).

Return flights

08 Sep - 22 Sep	Royal Air Maroc
08 Sep - 21 Sep	Royal Air Maroc
07 Sep - 17 Sep	Royal Air Maroc
12 Sep - 19 Sep	Royal Air Maroc
12 Sep - 24 Sep	Royal Air Maroc
07 Sep - 14 Sep	Royal Air Maroc
07 Sep - 28 Sep	Royal Air Maroc
20 Sep - 10 Oct	Royal Air Maroc
10 Sep - 30 Sep	Ryanair
11 Sep - 20 Sep	LATAM Airlines Group
10 Sep - 24 Sep	Ryanair
06 Sep - 31 Oct	Ryanair
10 Sep - 03 Oct	Ryanair
10 Sep - 12 Oct	SWISS
25 Sep - 11 Oct	TAP
21 Sep - 01 Oct	LATAM Airlines Group
21 Sep - 09 Oct	LATAM Airlines Group
28 Sep - 13 Oct	SWISS
14 Sep - 06 Oct	Turkish Airlines
19 Sep - 04 Oct	Iberia

Also check the deals for one-way flights from Madrid to Buenos Aires 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Madrid to Buenos Aires in September from $1021

Return flights