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

Return flights

30 Sep - 08 Oct	Vueling Airlines
23 Sep - 08 Oct	Ryanair
22 Sep - 06 Oct	Avianca
24 Sep - 15 Oct	Avianca
24 Sep - 22 Oct	ITA Airways
25 Sep - 21 Oct	ITA Airways
21 Sep - 19 Oct	ITA Airways
30 Sep - 13 Oct	ITA Airways
25 Sep - 12 Oct	ITA Airways
26 Sep - 07 Oct	Avianca
26 Sep - 29 Sep	Avianca
22 Sep - 30 Sep	Avianca
24 Sep - 30 Sep	Avianca
26 Sep - 30 Sep	Avianca
23 Sep - 30 Sep	Avianca
25 Sep - 29 Sep	Vueling Airlines
22 Sep - 29 Sep	Vueling Airlines
22 Sep - 27 Sep	Norse Atlantic Airways (UK)
23 Sep - 27 Sep	Vueling Airlines
25 Sep - 27 Sep	Vueling Airlines

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 656€

Return flights