AirHint found the following cheapest return flights from Sao Paulo (GRU) to Zagreb (ZAG) in September 2025 (see full year).

Return flights

30 Sep - 11 Oct	KLM
22 Sep - 02 Oct	LATAM Airlines Group
19 Sep - 30 Sep	Air France
25 Sep - 09 Oct	KLM
15 Sep - 30 Sep	KLM
16 Sep - 27 Sep	TAP
08 Sep - 25 Sep	LATAM Airlines Group
17 Sep - 30 Sep	KLM
06 Sep - 18 Sep	KLM
04 Sep - 16 Sep	KLM
14 Sep - 21 Sep	Qatar Airways
06 Sep - 07 Oct	KLM
15 Sep - 25 Sep	KLM
02 Sep - 23 Sep	KLM

Also check the deals for one-way flights from Sao Paulo to Zagreb 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 Sao Paulo to Zagreb in September from 838€

Return flights