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

Return flights

27 Sep - 12 Oct	SWISS
17 Sep - 04 Oct	TAP
18 Sep - 04 Oct	TAP
02 Sep - 29 Sep	Luxair
08 Sep - 24 Sep	Ryanair
17 Sep - 02 Oct	KLM
18 Sep - 02 Oct	KLM
19 Sep - 05 Oct	Luxair
19 Sep - 11 Oct	Air France
16 Sep - 01 Oct	British Airways
29 Sep - 12 Oct	KLM
18 Sep - 03 Oct	KLM
26 Sep - 29 Sep	Luxair

Also check the deals for one-way flights from Luxemburg to Sao Paulo 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 Luxemburg to Sao Paulo in September from 655€

Return flights