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

Return flights

26 Sep - 16 Oct	TAAG Angola Airlines
15 Sep - 20 Sep	ITA Airways
26 Sep - 05 Oct	Avianca
15 Sep - 22 Sep	GOL Linhas Aéreas
09 Sep - 16 Sep	Lufthansa
18 Sep - 25 Sep	GOL Linhas Aéreas
16 Sep - 29 Sep	Copa
15 Sep - 21 Sep	ITA Airways
30 Sep - 02 Oct	Avianca
17 Sep - 24 Sep	Avianca
16 Sep - 23 Sep	Avianca
23 Sep - 09 Oct	Air Europa
19 Sep - 05 Oct	Avianca
16 Sep - 26 Sep	Avianca
18 Sep - 24 Sep	Copa
30 Sep - 07 Oct	GOL Linhas Aéreas
25 Sep - 02 Oct	GOL Linhas Aéreas
22 Sep - 06 Oct	Air Europa
29 Sep - 08 Oct	Air France
17 Sep - 24 Oct	Avianca

Also check the deals for one-way flights from Sao Paulo to London 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 London in September from 824€

Return flights