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

Return flights

04 Sep - 29 Sep	KLM
03 Sep - 29 Sep	KLM
15 Sep - 29 Sep	KLM
09 Sep - 21 Oct	ITA Airways
18 Sep - 29 Sep	KLM
11 Sep - 14 Oct	KLM
09 Sep - 24 Sep	KLM
08 Sep - 23 Sep	KLM
03 Sep - 17 Sep	ITA Airways
09 Sep - 23 Sep	KLM
04 Sep - 23 Sep	KLM
03 Sep - 24 Sep	KLM
16 Sep - 14 Oct	KLM
18 Sep - 05 Oct	KLM
01 Sep - 04 Oct	ITA Airways
19 Sep - 05 Oct	KLM
17 Sep - 01 Oct	Delta
29 Sep - 05 Oct	KLM
26 Sep - 29 Oct	KLM
16 Sep - 16 Oct	ITA Airways

Also check the deals for one-way flights from London 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 London to Sao Paulo in September from $833

Return flights